A mechanical device meant to be pressed with a finger in order to open or close an electric circuit or to activate a mechanism.
A badge worn on clothes, fixed with a pin through the fabric.
A bud.
An on-screen control that can be selected as an activator of an attached function.
The means for initiating a nuclear strike or similar cataclysmic occurrence.
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.
Synonym of endbutton, part of a violin-family instrument.
A globule of metal remaining on an assay cupel or in a crucible, after fusion.
Pedicle; the attachment point for antlers in cervids.
The soft circular tip at the end of a foil.
A raised pavement marker to further indicate the presence of a pavement-marking painted stripe.
The final joke at the end of a comedic act (such as a sketch, set, or scene).
The center (bullseye) of the house.
The player who is last to act after the flop, turn and river, who possesses the button.
A small white blotch on a cat's coat.
The end of a runway.
Synonym of adjuster.
The punchy or suspenseful line of dialogue that concludes a scene.
The head of an unexpanded mushroom.
The least amount of care or interest; a whit or jot.
A methaqualone tablet (used as a recreational drug).
A button man; a professional assassin.
A plastic disk used to represent the person in last position in a poker game; also dealer's button.
A piece of wood or metal, usually flat and elongated, turning on a nail or screw, to fasten something, such as a door.
The clitoris.
A knob; a small ball; a small, roundish mass.
The final segment of a rattlesnake's rattle.
A knob or disc that is passed through a loop or (buttonhole), serving as a fastener.
To fasten with a button.
To be fastened by a button or buttons.
To stop talking.
An electrical switch, in a generator or motor, that periodically reverses the direction of an electric current.
A binary map in a given group G, given by [g, h] = ghg⁻¹h⁻¹, where g and h are elements of G, which yields the group's identity if and only if the group operation commutes for g and h.
A binary map in a given ring R, given by [a, b] = ab − ba, where a and b are elements of R, which yields the ring's zero element if and only if the multiplication operation commutes for a and b.