sea oats

noun

plural in form but singular or plural in construction
: 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.

Word History

First Known Use

1879, in the meaning defined above

Time Traveler
The first known use of sea oats was in 1879

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Cite this Entry

“Sea oats.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sea%20oats. Accessed 10 Sep. 2025.

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