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. ]

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

n. [ Aëro- + -mancy: cf. F. aéromancie. ] Divination from the state of the air or from atmospheric substances; also, forecasting changes in the weather. [ 1913 Webster ]

n. [ Gr. &unr_; cock + &unr_; fight. ] Cockfighting. [ 1913 Webster ]

n. See Alectryomancy. [ 1913 Webster ]

n. [ Gr. &unr_; wheaten flour + -mancy: cf. F. aleuromancie. ] Divination by means of flour. Encyc. Brit. [ 1913 Webster ]

a. [ Pref. apo- + chromatic. ] (Optics) Free from chromatic and spherical aberration; -- said esp. of a lens in which rays of three or more colors are brought to the same focus, the degree of achromatism thus obtained being more complete than where two rays only are thus focused, as in the ordinary achromatic objective. -- Ap`o*chro"ma*tism n. [Webster 1913 Suppl.]

n. [ L. aroma, Gr. &unr_;: cf. OE. aromaz, aromat, spice, F. aromate. ] 1. The quality or principle of plants or other substances which constitutes their fragrance; agreeable odor; as, the aroma of coffee. [ 1913 Webster ]

2. Fig.: The fine diffusive quality of intellectual power; flavor; as, the subtile aroma of genius. [ 1913 Webster ]

n. A plant, drug, or medicine, characterized by a fragrant smell, and usually by a warm, pungent taste, as ginger, cinnamon, spices. [ 1913 Webster ]

{ } a. [ L. aromaticus, Gr. &unr_;: cf. F. aromatique. See Aroma. ] Pertaining to, or containing, aroma; fragrant; spicy; strong-scented; odoriferous; as, aromatic balsam. [ 1913 Webster ]

Aromatic compound (Chem.), one of a large class of organic substances, as the oils of bitter almonds, wintergreen, and turpentine, the balsams, camphors, etc., many of which have an aromatic odor. They include many of the most important of the carbon compounds and may all be derived from the benzene group, C6H6. The term is extended also to many of their derivatives. --
Aromatic vinegar. See under Vinegar. [ 1913 Webster ]

n. [ Cf. F. aromatisation. ] The act of impregnating or secting with aroma. [ 1913 Webster ]

v. t. [ imp. & p. p. Aromatized p. pr. & vb. n. Aromatizing. ] [ L. aromatizare, Gr. &unr_;: cf. F. aromatiser. ] To impregnate with aroma; to render aromatic; to give a spicy scent or taste to; to perfume. Bacon. [ 1913 Webster ]

n. One who, or that which, aromatizes or renders aromatic. Evelyn. [ 1913 Webster ]

a. Aromatic. [ Obs. ] Caxton. [ 1913 Webster ]

a. [ Gr. &unr_; astrology. ] Of or pertaining to divination by means of the stars; astrologic. [ R. ] Dr. H. More. [ 1913 Webster ]

‖n. [ L., fr. Gr. &unr_;, &unr_;, fr. &unr_; gr&unr_;ats, meal. ] (Med.) (a) An encysted tumor containing curdy matter. (b) A disease characterized by thickening and fatty degeneration of the inner coat of the arteries. [ 1913 Webster ]

a. (Med.) Of, pertaining to, or having the nature of, atheroma. Wiseman. [ 1913 Webster ]

n. [ L. auster south wind + -mancy. ] Soothsaying, or prediction of events, from observation of the winds. [ 1913 Webster ]

n. [ Gr. ba`ros weight + makro`s long + -meter. ] (Med.) An instrument for ascertaining the weight and length of a newborn infant. [ 1913 Webster ]

n. [ Pref. bi- + chromate. ] (Chem.) A salt containing two parts of chromic acid to one of the other ingredients; as, potassium bichromate; -- called also dichromate. [ 1913 Webster ]

v. t. To combine or treat with a bichromate, esp. with bichromate of potassium; as, bichromatized gelatine. [ 1913 Webster ]

n. [ NL., fr. Gr. brw^ma food, bibrw`skein to eat. ] 1. (Med.) Aliment; food. Dunglison. [ 1913 Webster ]

2. A light form of prepared cocoa (or cacao), or the drink made from it. [ 1913 Webster ]

n. [ Bromine + aldehyde. ] (Chem.) An oily, colorless fluid, CBr3.COH, related to bromoform, as chloral is to chloroform, and obtained by the action of bromine on alcohol. [ 1913 Webster ]

n. [ From Bromine. ] (Pharm.) A colorless or white crystalline compound, (CH2)6N4C2H5Br, used as a sedative in epilepsy. [ Webster 1913 Suppl. ]

n. [ Bromine + aniline. ] (Chem.) A substance analogous to chloranil but containing bromine in place of chlorine. [ Webster 1913 Suppl. ]

n. (Chem.) A salt of bromic acid. [ 1913 Webster ]

v. t. (Med.) To combine or impregnate with bromine; as, bromated camphor. [ 1913 Webster ]

n. One versed in the science of foods. [ 1913 Webster ]

n. [ Gr. &unr_;, &unr_;, food + -logy. ] The science of aliments. Dunglison. [ 1913 Webster ]

‖n. [ Sp. in Phil. I. ] In the Philippines, a light, two-wheeled, boxlike vehicle usually drawn by a single native pony and used to convey passengers within city limits or for traveling. It is the common public carriage. [ Webster 1913 Suppl. ]

n. [ Gr. &unr_; mirror + -mancy. See Catopter. ] (Antiq.) A species of divination, which was performed by letting down a mirror into water, for a sick person to look at his face in it. If his countenance appeared distorted and ghastly, it was an ill omen; if fresh and healthy, it was favorable. [ 1913 Webster ]

n. [ Gr. &unr_;; &unr_; centaur + &unr_; battle. ] (Ancient Art) A fight in which centaurs take part, -- a common theme for relief sculpture, as in the Parthenon metopes. [ Webster 1913 Suppl. ]

‖n. [ L., fr. Gr. &unr_; ointment for wrestlers, the place for wrestling, fr. khroy^n to wax over, fr. khro`s wax. ] 1. The unguent (a composition of oil and wax) with which wrestlers were anointed among the ancient Romans. [ 1913 Webster ]

2. (Anc. Arch.) That part of the baths and gymnasia in which bathers and wrestlers anointed themselves. [ 1913 Webster ]

3. (Zool.) The cere of birds. [ 1913 Webster ]

n. [ Gr. khro`s wax + -mancy. ] Divination by dropping melted wax in water. [ 1913 Webster ]

n. One who practices chiromancy. Dryden. [ 1913 Webster ]

n. [ Gr. chei`r hand + -mancy. ] The art or practice of foretelling events, or of telling the fortunes or the disposition of persons by inspecting the hand; palmistry. [ 1913 Webster ]

{ a. Of or pertaining to chiromancy. [ 1913 Webster ]

{ n. [ Gr. &unr_;. ] A chiromancer. [ 1913 Webster ]

n. a drug derived from phenothiazine and used as a sedative and tranquilizer. [ WordNet 1.5 ]

‖n.; pl. Chondromata [ NL., fr. Gr. &unr_; cartilage + -oma. ] A cartilaginous tumor or growth. [ 1913 Webster ]