n.
Pronunciation: ' jo ̇ ist
Function: noun
Etymology: Middle English giste, joiste, from Anglo-French giste, from Vulgar Latin *jacitum, from Latin jac ē re to lie ― more at ADJACENT
Date: 15th century
: any of the small timbers or metal beams ranged parallel from wall to wall in a structure to support a floor or ceiling
J joist