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Related to groined: grained
1. Anatomy The crease or hollow at the junction of the inner part of each thigh with the trunk, together with the adjacent region and often including the external genitals.
2. Architecture The curved edge at the junction of two intersecting vaults.
tr.v. groined, groin·ing, groins
To provide or build with groins.
[Alteration (influenced by loin) of Middle English grinde, perhaps from Old English grynde, abyss, hollow.]
A small jetty extending from a shore to protect a beach against erosion or to trap shifting sands.
[Early Modern English groyne, ultimately (via Middle French groin, snout, promontory, headland, and Middle English groin, snout) from Old French groin, snout, promontory, from Late Latin grunium, snout, from Vulgar Latin *grunīre, to grunt, variant of Latin grunnīre, to grunt.]