Scottish National Dictionary (1700–)
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First published 1965 (SND Vol. VI).
This entry has not been updated since then but may contain minor corrections and revisions.
MULLAG, n. A periwinkle, Buccinum undatum (Sc. c.1935 Fishery Board Gl.).
[Orig. and district uncertain.? Cai. dim. form of mull, a snuff-mill, or phs. ad. Gael. mullach, a top, peak, roof.]