a. [ See Aborigines. ] 1. First; original; indigenous; primitive; native; as, the aboriginal tribes of America. “Mantled o'er with aboriginal turf.” Wordsworth. [ 1913 Webster ]

2. Of or pertaining to aborigines; as, a Hindu of aboriginal blood. [ 1913 Webster ]

n. 1. An original inhabitant of any land; one of the aborigines. [ 1913 Webster ]

2. An animal or a plant native to the region. [ 1913 Webster ]

It may well be doubted whether this frog is an aboriginal of these islands. Darwin. [ 1913 Webster ]

n. The quality of being aboriginal. Westm. Rev. [ 1913 Webster ]

adv. Primarily. [ 1913 Webster ]

v. t. [ Pref. ad- + margin. ] To write in the margin. [ R. ] Coleridge. [ 1913 Webster ]

n. 1. 1 a family of fungi that produce white blisterlike sori on certain flowering plants.
Syn. -- family Albuginaceae. [ WordNet 1.5 ]

‖n. [ L., fr. angere to strangle, to choke. See anger, n. ] 1. (Med.) Any inflammatory affection of the throat, as the quinsy, malignant sore throat, croup, etc., especially such as tends to produce suffocation, choking, or shortness of breath. [ Obs. ] [ 1913 Webster + AS ]

2. (Med.) Any spasmodic severe suffocative pain. [ AS ]

3. (Med.) Angina pectoris. [ AS ]

Angina pectoris Chest pain caused by myocardial ischemia precipitated by exertion and relieved by rest. It is so called because the pain is accompanied by a sense of suffocating contraction or tightening of the lower part of the chest; -- called also breast pang, spasm of the chest. [ 1913 Webster + AS ]

adj. (Med.) Of or pertaining to angina or angina pectoris.
Syn. -- anginal, anginose, anginous [ WordNet 1.5 + AS ]

a. [ Pref. bi- + marginate. ] Having a double margin, as certain shells. [ 1913 Webster ]

a. (Bot.) Of, pertaining to, or resembling, a family of plants (Boraginaceæ) which includes the borage, heliotrope, beggar's lice, and many pestiferous plants. [ 1913 Webster ]

n., a., etc. See Borage, n., etc. [ 1913 Webster ]

v. t. [ L. compaginare, compaginatum. ] To unite or hold together; as, the side pieces compaginate the frame. [ Obs. ] W. Montagu. [ 1913 Webster ]

n. [ L. compaginatio. ] Union of parts; structure. [ Obs. ] Jer. Taylor. [ 1913 Webster ]

a. [ L. devirginatus, p. p. of devirginare. ] Deprived of virginity. [ R. ] [ 1913 Webster ]

v. t. To deprive of virginity; to deflower. [ R. ] Sandys. [ 1913 Webster ]

n. [ L. devirginatio. ] A deflowering. [ R. ] Feltham. [ 1913 Webster ]

v. t. [ L. emarginare; e out + marginare to furnish with a margin, fr. margo margin. ] To take away the margin of.

{ } a. 1. Having the margin interrupted by a notch or shallow sinus. [ 1913 Webster ]

2. (Bot.) Notched at the summit. [ 1913 Webster ]

3. (Cryst.) Having the edges truncated. [ 1913 Webster ]

adv. In an emarginate manner. [ 1913 Webster ]

n. The act of notching or indenting the margin, or the state of being so notched; also, a notch or shallow sinus in a margin. [ 1913 Webster ]

v. i. & t. [ imp. & p. p. Evaginated; p. pr. & vb. n. Evaginating. ] To become evaginate; to cause to be evaginate. [ Webster 1913 Suppl. ]

a. [ L. evaginatus, p. p., unsheathed. See Evagination. ] Protruded, or grown out, as an evagination{ 2 }; turned inside out; unsheathed; evaginated; as, an evaginate membrane. [ Webster 1913 Suppl. ]

n. [ L. evaginatio an extending, evaginare to unsheathe; e out + vagina sheath. ] 1. The act of unsheathing. [ 1913 Webster ]

2. An outgrowth or protruded part. [ Webster 1913 Suppl. ]

a. [ See Ferrugo. ] Having the color or properties of the rust of iron. [ 1913 Webster ]

n. Capacity for imagination. [ R. ] Coleridge. [ 1913 Webster ]

a. [ L. imaginabilis: cf. F. imaginable. ] Capable of being imagined; conceivable. [ 1913 Webster ]

Men sunk into the greatest darkness imaginable. Tillotson.

-- Im*ag"i*na*ble*ness, n. -- Im*ag"i*na*bly, adv. [ 1913 Webster ]

a. [ L. imaginalis. ] 1. Characterized by imagination; imaginative; also, given to the use or rhetorical figures or imagins. [ 1913 Webster ]

2. (Zool.) Of or pertaining to an imago. [ 1913 Webster ]

Imaginal disks (Zool.), masses of hypodermic cells, carried by the larvæ of some insects after leaving the egg, from which masses the wings and legs of the adult are subsequently formed. [ 1913 Webster ]

a. [ L. imaginans, p. pr. of imaginari: cf. F. imaginant. ] Imagining; conceiving. [ Obs. ] Bacon. -- n. An imaginer. [ Obs. ] Glanvill. [ 1913 Webster ]

a. In a imaginary manner; in imagination. B. Jonson. [ 1913 Webster ]

n. The state or quality of being imaginary; unreality. [ 1913 Webster ]

a. [ L. imaginarius: cf. F. imaginaire. ] Existing only in imagination or fancy; not real; fancied; visionary; ideal. [ 1913 Webster ]

Wilt thou add to all the griefs I suffer
Imaginary ills and fancied tortures? Addison. [ 1913 Webster ]

Imaginary calculus See under Calculus. --
Imaginary expression or
Imaginary quantity (Alg.), an algebraic expression which involves the impossible operation of taking the square root of a negative quantity; as, √-9, a + b √-1. --
Imaginary points,
lines,
surfaces, etc. (Geom.), points, lines, surfaces, etc., imagined to exist, although by reason of certain changes of a figure they have in fact ceased to have a real existence.

Syn. -- Ideal; fanciful; chimerical; visionary; fancied; unreal; illusive. [ 1913 Webster ]

n. (Alg.) An imaginary expression or quantity. [ 1913 Webster ]

a. Imaginative. [ Obs. ] Holland. [ 1913 Webster ]

n. [ OE. imaginacionum, F. imagination, fr. L. imaginatio. See Imagine. ] 1. The imagine-making power of the mind; the power to create or reproduce ideally an object of sense previously perceived; the power to call up mental imagines. [ 1913 Webster ]

Our simple apprehension of corporeal objects, if present, is sense; if absent, is imagination. Glanvill. [ 1913 Webster ]

Imagination is of three kinds: joined with belief of that which is to come; joined with memory of that which is past; and of things present, or as if they were present. Bacon. [ 1913 Webster ]

2. The representative power; the power to reconstruct or recombine the materials furnished by direct apprehension; the complex faculty usually termed the plastic or creative power; the fancy. [ 1913 Webster ]

The imagination of common language -- the productive imagination of philosophers -- is nothing but the representative process plus the process to which I would give the name of the “comparative.” Sir W. Hamilton. [ 1913 Webster ]

The power of the mind to decompose its conceptions, and to recombine the elements of them at its pleasure, is called its faculty of imagination. I. Taylor. [ 1913 Webster ]

The business of conception is to present us with an exact transcript of what we have felt or perceived. But we have moreover a power of modifying our conceptions, by combining the parts of different ones together, so as to form new wholes of our creation. I shall employ the word imagination to express this power. Stewart. [ 1913 Webster ]

3. The power to recombine the materials furnished by experience or memory, for the accomplishment of an elevated purpose; the power of conceiving and expressing the ideal. [ 1913 Webster ]

The lunatic, the lover, and the poet
Are of imagination all compact . . .
The poet's eye, in a fine frenzy rolling,
Doth glance from heaven to earth, from earth to heaven,
And as imagination bodies forth
The forms of things unknown, the poet's pen
Turns them to shapes, and gives to airy nothing
A local habitation and a name. Shak. [ 1913 Webster ]

4. A mental image formed by the action of the imagination as a faculty; a conception; a notion. Shak.

Syn. -- Conception; idea; conceit; fancy; device; origination; invention; scheme; design; purpose; contrivance. -- Imagination, Fancy. These words have, to a great extent, been interchanged by our best writers, and considered as strictly synonymous. A distinction, however, is now made between them which more fully exhibits their nature. Properly speaking, they are different exercises of the same general power -- the plastic or creative faculty. Imagination consists in taking parts of our conceptions and combining them into new forms and images more select, more striking, more delightful, more terrible, etc., than those of ordinary nature. It is the higher exercise of the two. It creates by laws more closely connected with the reason; it has strong emotion as its actuating and formative cause; it aims at results of a definite and weighty character. Milton's fiery lake, the debates of his Pandemonium, the exquisite scenes of his Paradise, are all products of the imagination. Fancy moves on a lighter wing; it is governed by laws of association which are more remote, and sometimes arbitrary or capricious. Hence the term fanciful, which exhibits fancy in its wilder flights. It has for its actuating spirit feelings of a lively, gay, and versatile character; it seeks to please by unexpected combinations of thought, startling contrasts, flashes of brilliant imagery, etc. Pope's Rape of the Lock is an exhibition of fancy which has scarcely its equal in the literature of any country. -- “This, for instance, Wordsworth did in respect of the words ‘imagination' and ‘fancy.' Before he wrote, it was, I suppose, obscurely felt by most that in ‘imagination' there was more of the earnest, in ‘fancy' of the play of the spirit; that the first was a loftier faculty and gift than the second; yet for all this words were continually, and not without loss, confounded. He first, in the preface to his Lyrical Ballads, rendered it henceforth impossible that any one, who had read and mastered what he has written on the two words, should remain unconscious any longer of the important difference between them.” Trench. [ 1913 Webster ]

The same power, which we should call fancy if employed on a production of a light nature, would be dignified with the title of imagination if shown on a grander scale. C. J. Smith. [ 1913 Webster ]

a. Pertaining to, involving, or caused by, imagination. [ 1913 Webster ]

n. Idealism. J. Grote. [ 1913 Webster ]

a. [ F. imaginatif. ] 1. Proceeding from, and characterized by, the imagination, generally in the highest sense of the word. [ 1913 Webster ]

In all the higher departments of imaginative art, nature still constitutes an important element. Mure. [ 1913 Webster ]

2. Given to imagining; full of images, fancies, etc.; having a quick imagination; conceptive; creative. [ 1913 Webster ]

Milton had a highly imaginative, Cowley a very fanciful mind. Coleridge. [ 1913 Webster ]

3. Unreasonably suspicious; jealous. [ Obs. ] Chaucer.

-- Im*ag"i*na*tive*ly, adv. -- Im*ag"i*na*tive*ness, n. [ 1913 Webster ]

n. the capability of imagining; the power of imagination.
Syn. -- imagination, vision. [ WordNet 1.5 ]

a. (Bot.) Not having a distinctive margin or border. Grey. [ 1913 Webster ]

a. [ See In- not, Devirginate. ] Not devirginate. [ Obs. ] Chapman. [ 1913 Webster ]

a. [ Infra + marginal. ] Below the margin; submarginal; as, an inframarginal convolution of the brain. [ 1913 Webster ]

a. Unimaginable; inconceivable. [ R. ] Bp. Pearson. [ 1913 Webster ]

a. Situated within the margin. Loudon. [ 1913 Webster ]

v. t. To insert as in a sheath; to produce intussusception in.

{ } a. (Biol.) (a) Sheathed. (b) Having one portion of a hollow organ drawn back within another portion. [ 1913 Webster ]

n. [ L. pref. in- + vagina sheath. ] [ 1913 Webster ]

1. (Biol.) The condition of an invaginated organ or part. [ 1913 Webster ]

2. The inward movement of the wall of a tissue or cell, to form a cavity; also, the cavity thus formed. [ PJC ]

3. Specifically: (Biol., Embryology) The inward movement of one part of the wall of a blastula, to form a gastrula; the process of gastrulation, in which layers of the ovum are differentiated. [ 1913 Webster +PJC ]

☞ In embolic invagination, one half of the blastosphere is pushed in towards the other half, producing an embryonic form known as a gastrula. -- In epibolic invagination, a phenomenon in the development of some invertebrate ova, the epiblast appears to grow over or around the hypoblast. [ 1913 Webster ]

a. [ Cf. F. marginal. ] 1. Of or pertaining to a margin. [ 1913 Webster ]

2. Written or printed in the margin; as, a marginal note or gloss. [ 1913 Webster ]

3. At the lower limit; barely sufficient; as, of marginal utility. [ PJC ]

n. (Economics) The increase in total cost of production as a result of producing one more unit of output; since certain ovrhead costs are fixed, the marginal cost is almost aways less than the total per-unit cost of production averaged over all units produced.
Syn. -- incremental cost, differential cost. [ WordNet 1.5 ]

‖n. pl. [ NL. ] Marginal notes. [ 1913 Webster ]

n. the property of being marginal or on the fringes. [ WordNet 1.5 ]