n. [ Cf. F. méconine. ] (Chem.) A substance regarded as an anhydride of meconinic acid, existing in opium and extracted as a white crystalline substance. Also erroneously called meconina, meconia, etc., as though it were an alkaloid. [ 1913 Webster ]
n. [ Gr. me`las, me`lanos, black. ] (Physiol.) A black pigment found in the pigment-bearing cells of the skin (particularly in the skin of the negro), in the epithelial cells of the external layer of the retina (then called fuscin), in the outer layer of the choroid, and elsewhere. It is supposed to be derived from the decomposition of hemoglobin. [ 1913 Webster ]
n. [ Gr. me`las, me`lanos, black. ] (Physiol.) A black pigment found in the pigment-bearing cells of the skin (particularly in the skin of the negro), in the epithelial cells of the external layer of the retina (then called fuscin), in the outer layer of the choroid, and elsewhere. It is supposed to be derived from the decomposition of hemoglobin. [ 1913 Webster ]
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