1. A bitter glycoside obtained from Linum catharticum (family Linaceae).
2. A protein in linseed.
3. Obsolete term for the threadlike, nonstaining (achromatic) substance of the cell nucleus, on which chromatin granules were thought to be suspended.
The information shown above for linin is provided by Stedman's.
* Stedman's, part of Lippincott Williams & Wilkins, provide a comprehensive line of health-science publications for healthcare professionals and medical students.