Achroic see achroous

achromasia, achromasie n. [Gr. a, without; chroma, color] Lacking the usual reaction to stains. see chromasia.

achromatic a. [Gr. a, without; chroma, color] Being achroous; stains not permeating readily; uncolored.

achromatic apparatus/figure Pertaining to mitosis, those structures (spindle fibers and cell centers) that do not stain readily.

achromatin n. [Gr. a, without; chroma, color] Those parts of the cell nucleus that do not absorb color of the basic stains. achromatinic a. see chromatin.

achromic a. [Gr. a, without; chroma, color] Free from color; unpigmented.

A-chromosome Any of the chromosomes of the normal chromosome complement, as opposed to the B-chromosomes.

achroous a. [Gr. a, without; chros, complexion] Colorless; un-pigmented; achromatic.

acia n. [L. acia, thread] (ARTHRO: Insecta) A thin cuticular plate of the mandible.

acicle n. [L. dim. acus, needle] (ARTHRO: Crustacea) A thorn-shaped scaphocerite of hermit crabs.

acicula n.; pl. -lae [L. dim. acus, needle] A slender needle-like process; a spine or bristle; something larger than a seta or chaeta. acicular, aciculate a.

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