Rōw'lock, n.

noun

(colloq. rŭl'uk), n. (Naut.) A contrivance or arrangement for supporting an oar in rowing. It consists sometimes of a hollow in the gunwale of a boat, sometimes of a pair of pins between which the oar rests on the edge of the gunwale, sometimes of a single pin to which the oar is hooked, or on top of which it is supported.

a a, c c, Rowlocks.

A rowboat is shown with its rowlocks labeled. — a a, c c, Rowlocks.