| dichotomy |
the process or result of division into two parts.
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| Dichroa |
a genus of plants of the family Saxifragaceae. D. febrifu´ga Lour. is a shrub found in China, India, Indonesia, and the Philippines, called ch'ang shan by the Chinese; its root, also called ch'ang shan, is used medicinally as a treatment for malaria.
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| dichroine |
an alkaloid from the plant Dichroa febrifuga (ch'ang shan); it has three isomeric forms: α-, β-, and γ-dichroine.
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| dichromatic v. |
a color vision deficiency (q.v.) in which one of the three cone pigments is missing altogether. The most common forms are protanopia and deuteranopia, each of which is transmitted by X-linked inheritance and affects about 1 per cent of white males. The third form, tritanopia, is very rare; and a fourth, tetartanopia, is of doubtful existence.
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| dichromic |
pertaining to two colors.
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