Definition of pulley mortise in US English:

pulley mortise

noun

Joinery Woodworking
  • A long mortise such as may be used to form a housing for a pulley in the side jamb of a sash window frame; (also) a long shallow horizontal mortise for installing ceiling joists from below.

Origin

Mid 18th century; earliest use found in Francis Price (bap. 1699, d. 1753), architectural surveyor and author. From pulley + mortise.

Pronunciation

pulley mortise

/ˈpʊli ˌmɔːtɪs/