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.
APPINITE. Geol. A group term for dark-coloured plutonic rocks with hornblende (1916 Mem. Geol. Survey Scot. 53. 167).
[Named by E. B. Bailey after Appin in Argyll.]