‖n. pl. [ NL., from Gr. &unr_; thorn + &unr_; wing, fin. ] (Zool.) A group of teleostean fishes having spiny fins. See Acanthopterygii. [ 1913 Webster ]

a. Pertaining to an acroterium; as, acroterial ornaments. P. Cyc. [ 1913 Webster ]

‖n.; pl. Acroteria [ L., fr. Gr. 'akrwth`rion summit, fr. 'a`kros topmost. ] (Arch.) (a) One of the small pedestals, for statues or other ornaments, placed on the apex and at the basal angles of a pediment. Acroteria are also sometimes placed upon the gables in Gothic architecture. J. H. Parker. (b) One of the pedestals, for vases or statues, forming a part roof balustrade. [ 1913 Webster ]

n. 1. 1 a genus of terrestrial ferns of tropical Asia and Africa.
Syn. -- genus Actiniopteris. [ WordNet 1.5 ]

‖ety>[ L. ] Meanwhile; temporary. [ 1913 Webster ]

a. Pertaining to administration, or to the executive part of government. [ 1913 Webster ]

a. [ L. adulterinus, fr. adulter. ] Proceeding from adulterous intercourse. Hence: Spurious; without the support of law; illegal. [ 1913 Webster ]

When any particular class of artificers or traders thought proper to act as a corporation without a charter, such were called adulterine guilds. Adam Smith. [ 1913 Webster ]

n. An illegitimate child. [ R. ] [ 1913 Webster ]

v. i. To commit adultery. Milton. [ 1913 Webster ]

n. pl. The last milk drawn in milking; strokings. [ Obs. ] Grose. [ 1913 Webster ]

{ } a. [ Gr. 'alexhth`rios fit to keep off or help, fr. 'alexhth`r one who keeps off, helper; 'ale`xein to keep off: cf. F. alexitère. ] (Med.) Resisting poison; obviating the effects of venom; alexipharmic. [ 1913 Webster ]

n. [ Gr. 'alexhth`rion a remedy, an amulet: cf. F. alexitère, LL. alexiterium. ] (Med.) A preservative against contagious and infectious diseases, and the effects of poison in general. Brande & C. [ 1913 Webster ]

n. [ F. altérité. ] The state or quality of being other; a being otherwise. [ R. ] [ 1913 Webster ]

For outness is but the feeling of otherness (alterity) rendered intuitive, or alterity visually represented. Coleridge. [ 1913 Webster ]

n. 1. The quality of being ambidextrous; the faculty of using both hands with equal facility. Hence: Versatility; general readiness; as, ambidexterity of argumentation. Sterne. [ 1913 Webster ]

Ignorant I was of the human frame, and of its latent powers, as regarded speed, force, and ambidexterity. De Quincey. [ 1913 Webster ]

2. Double-dealing. (Law) A juror's taking of money from the both parties for a verdict. [ 1913 Webster ]

a. [ Gr. 'amfo`teros both. ] 1. Partly one and partly the other [ 1913 Webster ]

2. Especially: (Chem.) Having both acidic and basic groups within the same molecule, and consequently neither acid nor alkaline; neutral. [ R. ] Smart. [ PJC ]

n. 1. an antibiotic and antifungal agent (C47H73NO17), produced by a strain of Streptomyces nodosus. It is one of a class of polyene macrolide antibiotics effective against fungal infections. It has a molecular weight of 924.11; it is soluble in oganic solvents but only slightly soluble in water.
Syn. -- Fungizone. [ WordNet 1.5 ]

n. 1. 1 a highly variable species (Angiopteris evecta) of very large primitive ferns of the Pacific tropical areas with high rainfall.
Syn. -- giant fern [ WordNet 1.5 ]

a. [ L. anterior, comp. of ante before. ] 1. Before in time; antecedent. [ 1913 Webster ]

Antigonus, who was anterior to Polybius. Sir G. C. Lewis. [ 1913 Webster ]

2. Before, or toward the front, in place; as, the anterior part of the mouth; -- opposed to posterior. [ 1913 Webster ]

☞ In comparative anatomy, anterior often signifies at or toward the head, cephalic; and in human anatomy it is often used for ventral. [ 1913 Webster ]

Syn. -- Antecedent; previous; precedent; preceding; former; foregoing. [ 1913 Webster ]

n. [ LL. anterioritas. ] The state of being anterior or preceding in time or in situation; priority. Pope. [ 1913 Webster ]

adv. In an anterior manner; before. [ 1913 Webster ]

a. & n. See Antihysteric. [ 1913 Webster ]

a. (Med.) (a) killing or inhibiting the growth of bacteria; -- applied also to serum for protection against bacterial diseases. (b) Opposed to the bacterial theory of disease. [ archaic ] [ Webster 1913 Suppl. +PJC ]

n. (Med.) a chemical substance which kills or inhibits the growth of bacteria. [ PJC ]

a. (Med.) Good against dysentery. -- n. A medicine for dysentery. [ 1913 Webster ]

a. (Med.) Counteracting hysteria. -- n. A remedy for hysteria. [ 1913 Webster ]

a. (Med.) Good against jaundice. -- n. A remedy for jaundice. [ 1913 Webster ]

‖n. [ L., fr. Gr. &unr_;, fr. &unr_; to strip one's self. ] (Anc. Arch.) The apartment at the entrance of the baths, or in the palestra, where one stripped; a dressing room. [ 1913 Webster ]

‖ [ L. a (ab) + posterior latter. ] 1. (Logic) Characterizing that kind of reasoning which derives propositions from the observation of facts, or by generalizations from facts arrives at principles and definitions, or infers causes from effects. This is the reverse of a priori reasoning. [ 1913 Webster ]

2. (Philos.) Applied to knowledge which is based upon or derived from facts through induction or experiment; inductive or empirical. [ 1913 Webster ]

‖n. pl. [ NL. See Aptera. ] (Zool.) Naked spaces between the feathered areas of birds. See Pteryliæ. [ 1913 Webster ]

, n. (Microbiol.) A group of single-celled microorganisms including the methanogens and some halophiles and thermoacidophiles, recognized in the 1970's by C. R. Woese and his colleagues as being a distinct group on the basis of RNA sequences, cell walls, and coenzymes differing from those of other microbes. It is believed to be an ancient form of living organism that evolved separately from the eubacteria and blue-green algae. It is classified as a separate kingdom by some taxonomists. See also The Archaebacteria. [ PJC ]

a. (Biol.) Relating to the archenteron; as, archenteric invagination. [ 1913 Webster ]

n. 1. a blood vessel that carries blood from the heart to the body.
Syn. -- artery. [ WordNet 1.5 ]

a. [ L. arteriacus, Gr. &unr_;. See Artery. ] Of or pertaining to the windpipe. [ 1913 Webster ]

a. [ Cf. F. artériel. ] 1. Of or pertaining to an artery, or the arteries; as, arterial action; the arterial system. [ 1913 Webster ]

2. Of or pertaining to a main channel (resembling an artery), as a river, canal, or railroad. [ 1913 Webster ]

Arterial blood, blood which has been changed and vitalized (arterialized) during passage through the lungs. [ 1913 Webster ]

v. same as arterialize.
Syn. -- arterialize [ WordNet 1.5 ]

n. (Physiol.) The process of converting venous blood into arterial blood during its passage through the lungs, oxygen being absorbed and carbonic acid evolved; -- called also aëration and hematosis. [ 1913 Webster ]

v. t. [ imp. & p. p. Arterialized; p. pr. & vb. n. Arterializing. ] To transform, as the venous blood, into arterial blood by exposure to oxygen in the lungs; to make arterial. [ 1913 Webster ]

n. [ Gr. &unr_; + -graphy. ] A systematic description of the arteries. [ 1913 Webster ]

adj. 1. of or pertaining to an arteriole. [ WordNet 1.5 ]

/mhw>, n. [ NL. arteriola, dim. of L. arteria: cf. F. artériole. ] A small artery with a muscular wall. [ 1913 Webster +PJC ]

n. [ Gr. &unr_; + -logy. ] That part of anatomy which treats of arteries. [ 1913 Webster ]

n. [ Gr. 'arthri`a + -logy. ] (Med.) a form of arteriosclerosis which affects predominantly the arterioles, found especially in people with chronic hypertension. Stedman [ PJC ]

‖n. [ NL.; Gr. &unr_; artery + sclerosis. ] (Med.) a chronic disease characterized by abnormal thickening and hardening of the walls of the arteries, esp. of the intima, occurring mostly in old age. Subtypes are distinguished, such as arteriolosclerosis and atherosclerosis. -- Ar*te`ri*o*scle*rot"ic a. [Webster 1913 Suppl. +PJC]

adj. 1. of or pertaining to arteriosclerosis. [ WordNet 1.5 ]

n. [ L. arteriotomia, Gr. &unr_;; &unr_; + &unr_; a cutting. ] 1. (Med.) The opening of an artery, esp. for bloodletting. [ 1913 Webster ]

2. That part of anatomy which treats of the dissection of the arteries. [ 1913 Webster ]

adj. 1. connecting an artery to a vein. an arteriovenous fistula [ WordNet 1.5 ]

‖n. [ Artery + -etis. ] Inflammation of an artery or arteries. Dunglison. [ 1913 Webster ]

‖n. [ NL., fr. Gr. &unr_; starred, fr. 'asth`r star. ] (Zool.) A genus of echinoderms. [ 1913 Webster ]

☞ Formerly the group of this name included nearly all starfishes and ophiurans. Now it is restricted to a genus including the commonest shore starfishes. [ 1913 Webster ]

a. [ See Asterias. ] Radiated, with diverging rays; as, asteriated sapphire. [ 1913 Webster ]

{ ‖‖ } n. pl. [ NL., fr. Gr. 'asteri`as + -oid. See Asterias. ] (Zool.) A class of Echinodermata including the true starfishes. The rays vary in number and always have ambulacral grooves below. The body is star-shaped or pentagonal. [ 1913 Webster ]