The Collaborative International Dictionary of English v.0.48:

Trivet \Triv"et\, n. [Probably through French fr. L. tripes,
   -edis, three-footed; tri- (see Tri-)+ pes, pedis, foot: cf.
   F. tr['e]pied. See Foot, and cf. Tripod.]
   1. A tree-legged stool, table, or other support; especially,
      a stand to hold a kettle or similar vessel near the fire;
      a tripod. [Written also trevet.]
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   2. A weaver's knife. See Trevat. --Knight.
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   Trivet table, a table supported by three legs. --Dryden.
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