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The end of a hammerhead opposite the flat striking surface, often wedge-shaped or ball-shaped and used for chipping, indenting, and metalworking.
tr.v. peened, peen·ing, peens
To hammer, bend, or shape with a peen.
[Probably of Scandinavian origin.]
(Tools) the end of a hammer head opposite the striking face, often rounded or wedge-shaped
(Tools) (tr) to strike with the peen of a hammer or with a stream of metal shot in order to bend or shape (a sheet of metal)
[C17: variant of pane, perhaps from French panne, ultimately from Latin pinna point]
1. the usu. wedgelike or spherical end of a hammer head opposite the face.v.t.
2. to enlarge, straighten, or smooth with a peen.
[1505–15; earlier pen < Scandinavian; compare Swedish, Norwegian pen (n.) in same sense (perhaps < German Pinne peen). See pin]
Past participle: peened