Groin, v. t. [imp. & p. p. Groined p. pr. & vb. n. Groining.] Arch. To fashion into groins; to build with groins.
The hand that rounded Peter's dome,
And groined the aisles of Christian Rome,
Wrought in a sad sincerity. --Emerson.
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Groined a. Arch. Built with groins; as, a groined ceiling; a groined vault.
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