MUREXAN n.
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.
NATURAL a. 18 definitions
Fixed or determined by nature; pertaining to the constitution of a thing; belonging to native character; according to nature; essential; characteristic; not artifical, foreign, assumed, put on, or acquired; as, the natural growth of animals or plants; the natural motion of a gravitating body; natural strength or dispos…
NEEDLE n. 7 definitions
th; a sulphide of bismuth, lead, and copper occuring in acicular crystals; -- called also aikinite. -- Needle shell (Zoöl.), a sea urchin. -- Needle spar (Min.), aragonite. -- Needle telegraph, a telegraph in which the signals are given by the deflections of a magnetic needle to the right or to the left of a certain…