In software projects under source control: the most current source tree, from which the latest unstable builds (so-called "trunk builds") are compiled.
The main line or body of anything.
A large pipe forming the piston rod of a steam engine, of sufficient diameter to allow one end of the connecting rod to be attached to the crank, and the other end to pass within the pipe directly to the piston, thus making the engine more compact.
From Middle English tronke, trunke, borrowed from Old French tronc ("alms box, tree trunk, headless body"), from Latin truncus ("a stock, lopped tree trunk"), from truncus. For the verb, compare French tronquer, and see truncate. truncus, and tronk.
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