| polychromatic | Showing a variety, or a change, of colours. <chemistry> Polychromatic acid, a substance obtained by the action of nitric acid on aloes. Origin: Poly- + chromatic. Source: Websters Dictionary (01 Mar 1998) |
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| polychromatic cell | A primitive erythrocyte in bone marrow, with basophilic material as well as haemoglobin (acidophilic) in the cytoplasm. Synonym: polychromatophil cell. (05 Mar 2000) |