The Collaborative International Dictionary
Tallow \Tal"low\, n. [OE. taluh, talugh; akin to OD. talgh, D. talk, G., Dan. and Sw. talg, Icel. t[=o]lgr, t[=o]lg, t[=o]lk; and perhaps to Goth. tulgus firm.]
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The suet or fat of animals of the sheep and ox kinds, separated from membranous and fibrous matter by melting.
Note: The solid consistency of tallow is due to the large amount of stearin it contains. See Fat.
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The fat of some other animals, or the fat obtained from certain plants, or from other sources, resembling the fat of animals of the sheep and ox kinds.
Tallow candle, a candle made of tallow.
Tallow catch, a keech. See Keech. [Obs.]
Tallow chandler, one whose occupation is to make, or to sell, tallow candles.
Tallow chandlery, the trade of a tallow chandler; also, the place where his business is carried on.
Tallow tree (Bot.), a tree ( Stillingia sebifera) growing in China, the seeds of which are covered with a substance which resembles tallow and is applied to the same purposes.
Wiktionary
n. (taxlink Triadica sebifera species noshow=1), a tree native to eastern Asia, with a waxy seed coating used in candle and soap manufacture.