Definition of sea oats

: a tall grass (Uniola paniculata) that has panicles resembling those of the oat, grows chiefly on the coast of the southern U.S., and is useful as a sand binder; also : a related plant (Chasmanthium latifolium synonym U. latifolia) chiefly of the eastern U.S.

Recent Examples of sea oats from the Web

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First Known Use of sea oats

1879

in the meaning defined above

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