sea oak


Definition of sea oak

1 : any of various rockweeds (especially Fucus vesiculosus and F. serratus)
2 British : a sertularian hydroid (Dynamena punila) that forms a small much-branched arborescent colony with a tough horny skeleton into which the polyps can contract

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Cite this Entry

“Sea oak.” Dictionary, Merriam-Webster, Accessed 2 Dec. 2021.

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