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screwMain Entry: 1screw Pronunciation: \ˈskrü\ Function: noun Etymology: Middle English scrue, from Middle French escroe female screw, nut, from Medieval Latin scrofa, from Latin, sow Date: 15th century 1 a : a simple machine of the inclined plane type consisting of a spirally grooved solid cylinder and a correspondingly grooved hollow cylinder into which it fits b : a nail-shaped or rod-shaped piece with a spiral groove and a slotted or recessed head designed to be inserted into material by rotating (as with a screwdriver) and used for fastening pieces of solid material together — screw·like \-ˌlīk\ adjective — have a screw loose : to be mentally unbalanced
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