Definition of leatherjacket

1a : a filefish (family Monacanthidae)
b or less commonly leather jack : any of several fishes (genus Oligoplites) of the family Carangidae having the scales reduced and embedded in the skin especially : a common fish (O. saurus) of both coasts of tropical America
2 : any of several Australian trees with very tough close smooth bark especially : coachwood sense 1a
3 Australia : a johnnycake pan-fried or baked in hot ashes

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“Leatherjacket.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/leatherjacket. Accessed 15 May. 2021.

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