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.

Achromatically
(Ach`ro*mat"ic*al*ly) adv. In an achromatic manner.

Achromaticity
(Ach`ro*ma*tic"i*ty) n. Achromatism.

Achromatin
(A*chro"ma*tin) n. (Biol.) Tissue which is not stained by fluid dyes. W. Flemming.

Achromatism
(A*chro"ma*tism) n. [Cf. F. achromatisme.] The state or quality of being achromatic; as, the achromatism of a lens; achromaticity. Nichol.

Achromatization
(A*chro`ma*ti*za"tion) n. [Cf. F. achromatisation.] The act or process of achromatizing.

Achromatize
(A*chro"ma*tize) v. t. [imp. & p. p. Achromatized ; p. pr. & vb. n. Achromatizing ] [Gr. 'a priv. + color.] To deprive of color; to make achromatic.

Achromatopsy
(A*chro"ma*top"sy) n. [Gr. 'a priv. + color + sight.] Color blindness; inability to distinguish colors; Daltonism.

Achronic
(A*chron"ic) a. See Acronyc.

Achroödextrin
(Ach`ro*ö*dex"trin) n. [Gr. colorless + E. dextrin.] (Physiol. Chem.) Dextrin not colorable by iodine. See Dextrin.

Achroous
(Ach"ro*ous) a. [Gr. 'a priv. + color.] Colorless; achromatic.

Achylous
(A*chy"lous) a. (Physiol.) Without chyle.

Achymous
(A*chy"mous) a. (Physiol.) Without chyme.

Acicula
(||A*cic"u*la) n.; pl. Aciculæ [L., a small needle, dimin. of acus needle.] (Nat. Hist.) One of the needlelike or bristlelike spines or prickles of some animals and plants; also, a needlelike crystal.

Achiote
(||A`chi*o"te) n. [Sp. achiote, fr. Indian achiotl.] Seeds of the annotto tree; also, the coloring matter, annotto.

Achlamydate
(A*chlam"y*date) a. [Gr. 'a priv. + . . a short cloak.] (Zoöl.) Not possessing a mantle; — said of certain gastropods.

Achlamydeous
(Ach`la*myd"e*ous) a. (Bot.) Naked; having no floral envelope, neither calyx nor corolla.

Acholia
(||A*cho"li*a) n. [NL., from Gr. 'a priv. + bile.] (Med.) Deficiency or want of bile.

Acholous
(Ach"o*lous) a. (Med.) Lacking bile.

Achromatic
(Ach`ro*mat"ic) a. [Gr. colorless; 'a priv. + color: cf. F. achromatique.]

1. (Opt.) Free from color; transmitting light without decomposing it into its primary colors.

2. (Biol.) Uncolored; not absorbing color from a fluid; — said of tissue.


  By PanEris using Melati.

Previous chapter/page Back Home Email this Search Discuss Bookmark Next chapter/page
Copyright: All texts on Bibliomania are © Bibliomania.com Ltd, and may not be reproduced in any form without our written permission. See our FAQ for more details.