D defs.my
Entry 1 sense Webster, 1913

escape wheel

/ĭs-kāp' wēl/ · es·cape· wheel · IPA
01 n. The rotating wheel in an escapement mechanism which has notches that are periodically engaged and disengaged by the anchor.
  1. 1.
    The rotating wheel in an escapement mechanism which has notches that are periodically engaged and disengaged by the anchor.