FOIN

foin. Foin, v.i. to push in fencing

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Foin (foin), n. [[F. fouine a marten.]] 1. 1. (Zoöl.) The beech marten (Mustela foina). See Marten.
2. 2. A kind of fur, black at the top on a whitish ground, taken from the ferret or weasel of the same name.
He came to the stake in a fair black gown furred and faced with foins. Fuller.