D defs.my
Entry 1 sense Webster, 1913

Murexan

· Mu·rex·an · IPA
01 n. A complex nitrogenous substance obtained from murexide, alloxantin, and other ureids, as a white, or yellowish, crystalline which turns red…
  1. 1.
    A complex nitrogenous substance obtained from murexide, alloxantin, and other ureids, as a white, or yellowish, crystalline which turns red on exposure to the air; -- called also uramil, dialuramide, and formerly purpuric acid.(Chem.) Also: uramil, dialuramide, purpuric acid