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The Collaborative International Dictionary
Achromatism

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

Wiktionary
achromatism

n. 1 The state or quality of being achromatic; as, the '''achromatism''' of a lens; achromaticity. 2 The state of being free of colors, not emitting or separate into colors. 3 achromatopia.

WordNet
achromatism

n. the visual property of being without color [syn: colorlessness, colourlessness] [ant: color]

Usage examples of "achromatism".

Very occasionally a person lacks all color-receptors and is completely color-blind, a condition called achromatism (ay-kroh'muh-tiz-um.

INDEX INDEX Abduc«ns nerve, 207 Accessory nerve, 208 Acetylcholine, 132 autonomic nervous system and, 218 Achromatism, 297 Acoustic area, 177 Acoustic nerve, 208, 265 Acromegaly, 95 ACTH, 82 autonomic nervous system and, 219 Addison, Thomas, 76 Addison's disease, 76 ADH, 63 Adrenal glands, 40 Adrenalin, 41 schizophrenia and, 335 Adrenergic nerves, 218 Adrenochrome, 335 Adrenocorticotrophic hormone, 82 Alanine, 10 Albinos, eyes of, 276, 277 Aldosterone, 80 Allergies, histamine and, 43-44 All-or-none law, 137 Alpha waves, 178 Amine group, 9 Amino acids, 8 abbreviations of, 11, 12 arrangements of, 14, 15, 36 Amino acids, contd.