Definition of strongback in US English:

strongback

noun

  • 1Caribbean. Any of several plants used to make medicinal infusions.

  • 2Nautical. Any of various strong beams or supports.

Origin

Mid 18th century; earliest use found in Philosophical Transactions of the Royal Society of London. From strong + back, in sense 1 with allusion to the strengthening qualities attributed to medicinal infusions made from the plant.

Pronunciation

strongback

/ˈstrɒŋbak/