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(clothing) A knob or disc that is passed through a loop or (buttonhole), serving as a fastener.
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A mechanical device meant to be pressed with a finger in order to open or close an electric circuit or to activate a mechanism.
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(graphical user interface) An on-screen control that can be selected as an activator of an attached function.
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(US) A badge worn on clothes, fixed with a pin through the fabric.
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(botany) A bud.
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The head of an unexpanded mushroom.
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(slang) The clitoris.
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(curling) The center (bullseye) of the house.
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(fencing) The soft circular tip at the end of a foil.
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(poker) A plastic disk used to represent the person in last position in a poker game; also dealer's button.
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(poker) The player who is last to act after the flop, turn and river, who possesses the button.
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(archaic) A person who acts as a decoy.
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A raised pavement marker to further indicate the presence of a pavement-marking painted stripe.
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(aviation) The end of a runway.
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(South Africa, slang) A methaqualone tablet (used as a recreational drug).
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A piece of wood or metal, usually flat and elongated, turning on a nail or screw, to fasten something, such as a door.
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A globule of metal remaining on an assay cupel or in a crucible, after fusion.
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A knob; a small ball; a small, roundish mass.
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A small white blotch on a cat's coat.
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(UK, archaic) A unit of length equal to ¹⁄₁₂ inch.
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(generally with the) The means for initiating a nuclear strike or similar cataclysmic occurrence.
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(glassblowing) The oblate spheroidal mass of glass attaching a stem to either its bowl or foot.
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(lutherie) In an instrument of the violin family, the near-semicircular shape extending from the top of the back plate of the instrument, meeting the heel of the neck.
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(lutherie) Synonym of endbutton, part of a violin-family instrument.
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(lutherie, bowmaking) Synonym of adjuster.
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The least amount of care or interest; a whit or jot.
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(television) The punchy or suspenseful line of dialogue that concludes a scene.
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(comedy) The final joke at the end of a comedic act (such as a sketch, set, or scene).
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(slang) A button man; a professional assassin.
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The final segment of a rattlesnake's rattle.
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(dated, Southern US) A clove (of garlic).
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(zoology) Pedicle; the attachment point for antlers in cervids.