Scottish National Dictionary (1700–)
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First published 1976 (SND Vol. X, list of scientific terms with Scottish connections).
This entry has not been updated since then but may contain minor corrections and revisions.
COLLOID, adj. Chem. Of an inert noncrystalline structure like gelatine (1861 Philosoph. Trans. CLI. 184).
[In this chemical sense the word, first recorded in 1847, was used by Thomas Graham (see Graham), as opposed to Crystalloid, q.v.]
