any of various tropical carangid fishes of the genera Oligoplites and Scomberoides, having a leathery skin
2.
any of various brightly coloured tropical triggerfishes of the genus Monacanthus and related genera
3.
the greyish-brown tough-skinned larva of certain craneflies, esp of the genus Tipula, which destroy the roots of grasses, etc
leatherjacket in American English
(ˈleðərˌdʒækɪt)
noun
1. Also called: leather jack
any of several carangid fishes having narrow, linear scales embedded in the skin at various angles, esp Oligoplites saurus, found in tropical American waters