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.
DALRADIAN, adj. Geol. Referring to the series of metamorphic rocks extending from Kintyre to Rattray Head in Aberdeenshire (1891 Sir A. Geikie in Proc. Geol. Soc. London XLVII. 75).
[From the Celtic Kingdom of Dalriada in Argyll.]