Pronunciation: (as'pur-in, -prin), [key]
—pl. -rin, -rins.
1. Pharm.a white, crystalline substance, C9H8O4, derivative of salicylic acid, used as an anti-inflammatory agent and to relieve the pain of headache, rheumatism, gout, neuralgia, etc.; acetylsalicylic acid.
2. an aspirin tablet: I took two aspirin and went right to bed.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.