Scottish National Dictionary (1700–)
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First published 1974 (SND Vol. IX).
This entry has not been updated since then but may contain minor corrections and revisions.
UIMRO, n. The greasy film or layer attached to lower ends of wool when ‘loosening' on a sheep's back (Ork. 1929 Marw.). Cf. Set. [′ømro]
[Phs. a deriv. of uim, s.v. Oam, n.]