Thong (?), n. [OE. thong, þwong, thwang, AS. þwang; akin to Icel. þvengr a thong, latchet. √57. Cf. Twinge.] A strap of leather; especially, one used for fastening anything.
And nails for loosened spears, and thongs for shields, provide. Dryden.
Thong seal(Zoöl.), the bearded seal. See the Note under Seal.