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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.
[L. linum, fr. G. linon, flax]
Etymology: Gk, linon, flax
the faintly staining threads seen in the nuclei of cells, with granules of chromatin attached to the threads. See also karyolymph.