D defs.my
Entry 1 sense Webster, 1913

Detent

· De·tent · IPA /dɪˈtɛnt/
01 n. That which locks or unlocks a movement; a catch, pawl, or dog; especially, in clockwork, the catch which locks and unlocks the wheelwork in…
  1. 1.
    That which locks or unlocks a movement; a catch, pawl, or dog; especially, in clockwork, the catch which locks and unlocks the wheelwork in striking.(Mech.)