noun Bal·a·nus \ˈbalənəs\

Definition of Balanus

  1. :  a very large genus (the type of the family Balanidae) of barnacles comprising the sessile acorn barnacles and including littoral and deepwater forms some of which cause destructive fouling of ships and of underwater cables

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Origin and Etymology of balanus

New Latin, from Latin, acorn, from Greek balanos — more at gland

First Known Use: 1728

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