{ } a. Pertaining to Aaron, the first high priest of the Jews. [ 1913 Webster ]

[ See Exodus vii. 9 and Numbers xvii. 8 ] 1. (Arch.) A rod with one serpent twined around it, thus differing from the caduceus of Mercury, which has two. [ 1913 Webster ]

2. (Bot.) A plant with a tall flowering stem; esp. the great mullein, or hag-taper, and the golden-rod. [ 1913 Webster ]

n. same as abortionist. [ PJC ]

v. t. [ OE. abrochen, OF. abrochier. See Broach. ] To set abroach; to let out, as liquor; to broach; to tap. [ Obs. ] Chaucer. [ 1913 Webster ]

adv. [ Pref. a- + broach. ] 1. Broached; in a condition for letting out or yielding liquor, as a cask which is tapped. [ 1913 Webster ]

Hogsheads of ale were set abroach. Sir W. Scott. [ 1913 Webster ]

2. Hence: In a state to be diffused or propagated; afoot; astir. “Mischiefs that I set abroach.” Shak. [ 1913 Webster ]

adv. [ Pref. a- + broad. ] 1. At large; widely; broadly; over a wide space; as, a tree spreads its branches abroad. [ 1913 Webster ]

The fox roams far abroad. Prior. [ 1913 Webster ]

2. Without a certain confine; outside the house; away from one's abode; as, to walk abroad. [ 1913 Webster ]

I went to St. James', where another was preaching in the court abroad. Evelyn. [ 1913 Webster ]

3. Beyond the bounds of a country; in foreign countries; as, we have broils at home and enemies abroad. “Another prince . . . was living abroad.” Macaulay. [ 1913 Webster ]

4. Before the public at large; throughout society or the world; here and there; widely. [ 1913 Webster ]

He went out, and began to publish it much, and to blaze abroad the matter. Mark i. 45. [ 1913 Webster ]

To be abroad. (a) To be wide of the mark; to be at fault; as, you are all abroad in your guess. (b) To be at a loss or nonplused. [ 1913 Webster ]

n. 1. 1 ratlike rodent of the Andes with soft fur and large ears.
Syn. -- chinchilla rat, rat chinchilla [ WordNet 1.5 ]

a. Capable of being abrogated. [ 1913 Webster ]

a. [ L. abrogatus, p. p. ] Abrogated; abolished. [ Obs. ] Latimer. [ 1913 Webster ]

v. t. [ imp. & p. p. Abrogated; p. pr. & vb. n. Abrogating. ] [ L. abrogatus, p. p. of abrogare; ab + rogare to ask, require, propose. See Rogation. ] 1. To annul by an authoritative act; to abolish by the authority of the maker or his successor; to repeal; -- applied to the repeal of laws, decrees, ordinances, the abolition of customs, etc. [ 1913 Webster ]

Let us see whether the New Testament abrogates what we so frequently see in the Old. South. [ 1913 Webster ]

Whose laws, like those of the Medes and Persian, they can not alter or abrogate. Burke. [ 1913 Webster ]

2. To put an end to; to do away with. Shak. [ 1913 Webster ]

Syn. -- To abolish; annul; do away; set aside; revoke; repeal; cancel; annihilate. See Abolish. [ 1913 Webster ]

n. [ L. abrogatio, fr. abrogare: cf. F. abrogation. ] The act of abrogating; repeal by authority. Hume. [ 1913 Webster ]

a. Tending or designed to abrogate; as, an abrogative law. [ 1913 Webster ]

n. One who repeals by authority. [ 1913 Webster ]

adv. [ Pref. a- + brood. ] In the act of brooding. [ Obs. ] Abp. Sancroft. [ 1913 Webster ]

v. t. [ Pref. a- + brook, v. ] To brook; to endure. [ Obs. ] Shak. [ 1913 Webster ]

a. [ Gr. &unr_;, fr. &unr_; spine + fe`rein to bear. ] Spine-bearing. Gray. [ 1913 Webster ]

a. [ Gr. &unr_; spine + &unr_; wing. ] 1. (Zool.) Spiny-winged. [ 1913 Webster ]

2. (Zool.) Acanthopterygious. [ 1913 Webster ]

a. [ NL., acarus a mite + -oid. ] (Zool.) Shaped like or resembling a mite. [ 1913 Webster ]

n. [ Accelerate + -graph. ] (Mil.) An apparatus for studying the combustion of powder in guns, etc. [ 1913 Webster ]

n. [ Accelerate + -meter. ] An apparatus for measuring the velocity imparted by gunpowder. [ 1913 Webster ]

v. t. [ OE. acrochen, accrochen, to obtain, OF. acrochier, F. accrocher; à (L. ad) + croc hook (E. crook). ] 1. To hook, or draw to one's self as with a hook. [ Obs. ] [ 1913 Webster ]

2. To usurp, as jurisdiction or royal prerogatives. [ 1913 Webster ]

They had attempted to accroach to themselves royal power. Stubbs. [ 1913 Webster ]

n. [ Cf. F. accrochement. ] An encroachment; usurpation. [ Obs. ] Bailey. [ 1913 Webster ]

a. [ (a) L. acerosus chaffy, fr. acus, gen. aceris, chaff; (b) as if fr. L. acus needle: cf. F. acéreux. ] (Bot.) (a) Having the nature of chaff; chaffy. (b) Needle-shaped, having a sharp, rigid point, as the leaf of the pine. [ 1913 Webster ]

a. Same as Acerose. [ 1913 Webster ]

a. [ Gr. α priv. + ke`ras a horn. ] (Zool.) (a) Destitute of tentacles, as certain mollusks. (b) Without antennæ, as some insects. [ 1913 Webster ]

a. [ L. acetablum a little cup + -ferous. ] Furnished with fleshy cups for adhering to bodies, as cuttlefish, etc. [ 1913 Webster ]

n. [ L., fr. Gr. &unr_;. ] (Myth.) A river in the Nether World or infernal regions; also, the infernal regions themselves. By some of the English poets it was supposed to be a flaming lake or gulf. Shak. [ 1913 Webster ]

n. 1. 1 death's-head moth.
Syn. -- genus Acherontia [ WordNet 1.5 ]

a. Of or pertaining to Acheron; infernal; hence, dismal, gloomy; moribund. [ 1913 Webster ]

n. (Med.) A skeletal disorder beginning before birth; cartilage is converted to bone resulting in dwarfism. [ WordNet 1.5 ]

adj. (Med.) of or pertaining to achondroplasia. [ WordNet 1.5 ]

a. [ Gr. 'achrw`matos colorless; 'a priv. + chrw^ma, chrw`matos, color: cf. F. achromatique. ] 1. (Opt.) Free from color; transmitting light without decomposing it into its primary colors. [ 1913 Webster ]

2. (Biol.) Uncolored; not absorbing color from a fluid; -- said of tissue. [ 1913 Webster ]

Achromatic lens (Opt.), a lens composed usually of two separate lenses, a convex and concave, of substances having different refractive and dispersive powers, as crown and flint glass, with the curvatures so adjusted that the chromatic aberration produced by the one is corrected by other, and light emerges from the compound lens undecomposed. --
Achromatic prism. See Prism. --
Achromatic telescope, or
microscope, one in which the chromatic aberration is corrected, usually by means of a compound or achromatic object glass, and which gives images free from extraneous color. [ 1913 Webster ]

adv. In an achromatic manner. [ 1913 Webster ]

n. Achromatism. [ 1913 Webster ]

n. (Biol.) Tissue which is not stained by fluid dyes. W. Flemming. [ 1913 Webster ]

adj. 1. not readily colored by stains; -- of substance of a cell nucleus chromatinic [ WordNet 1.5 ]

v. 1. remove color from.
Syn. -- achromatize, make achromatic [ WordNet 1.5 ]

n. [ Cf. F. achromatisme. ] The state or quality of being achromatic; as, the achromatism of a lens; achromaticity. Nichol. [ 1913 Webster ]

n. [ Cf. F. achromatisation. ] The act or process of achromatizing. [ 1913 Webster ]

v. t. [ imp. & p. p. Achromatized p. pr. & vb. n. Achromatizing ] [ Gr. 'a priv. + &unr_; color. ] To deprive of color; to make achromatic. [ Also spelled achromatise. ] [ 1913 Webster ]

n. [ Gr. 'a priv. + &unr_; color + &unr_; sight. ] Color blindness; inability to distinguish colors; Daltonism. [ 1913 Webster ]

a. [ See Ahromatic. ] Lacking, or deficient in, color; as, achromatous blood. [ Webster 1913 Suppl. ]

a. [ Gr. &unr_; colorless; &unr_; priv. + &unr_; color. ] Free from color; colorless; as, in (Physiol. Chem.), the achromic point of a starch solution acted upon by an amylolytic enzyme is the point at which it fails to give any color with iodine. [ Webster 1913 Suppl. ]

a. See Acronyc. [ 1913 Webster ]

n. [ Gr. &unr_; colorless + E. dextrin. ] (Physiol. Chem.) Dextrin not colorable by iodine. See Dextrin. [ 1913 Webster ]

a. [ Gr. &unr_;; 'a priv. + &unr_; color. ] Colorless; achromatic. [ 1913 Webster ]

a. [ L. acidus sour + -ferous. ] Containing or yielding an acid. [ 1913 Webster ]

. (Iron Metal.) That variety of either the Bessemer or the open-hearth process in which the converter or hearth is lined with acid, that is, highly siliceous, material. Opposed to basic process. [ Webster 1913 Suppl. ]

n. [ Gr. &unr_; undistinguishable; 'a priv. + &unr_; to separate, distinguish + &unr_; color. ] Color blindness; achromatopsy. [ 1913 Webster ]

{ } a. [ Gr. &unr_;, fr. &unr_; to hear. ] Communicated orally; oral; -- applied to the esoteric teachings of Aristotle, those intended for his genuine disciples, in distinction from his exoteric doctrines, which were adapted to outsiders or the public generally. Hence: Abstruse; profound. [ 1913 Webster ]