The Collaborative International Dictionary
thrumb
Thrum \Thrum\, n. [OE. thrum, throm; akin to OD. drom, D. dreum, G. trumm, lump, end, fragment, OHG. drum end, Icel. ?r["o]mr edge, brim, and L. terminus a limit, term. Cf. Term.]
One of the ends of weaver's threads; hence, any soft, short threads or tufts resembling these.
Any coarse yarn; an unraveled strand of rope.
(Bot.) A threadlike part of a flower; a stamen.
(Mining) A shove out of place; a small displacement or fault along a seam.
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(Naut.) A mat made of canvas and tufts of yarn.
Thrum cap, a knitted cap.
--Halliwell.Thrum hat, a hat made of coarse woolen cloth.
--Minsheu.
Wiktionary
thrumb
n. (alternative form of thrum English)