[1] : The Collaborative International Dictionary of English v.0.48

joist \joist\ joist, n. oe. giste, of. giste, f. g^ite, fr.
   gesir to lie, f. g'esir. see gist. arch.
   a piece of timber laid horizontally, or nearly so, to which
   the planks of the floor, or the laths or furring strips of a
   ceiling, are nailed; -- called, according to its position or
   use, binding joist, bridging joist, ceiling joist,
   trimming joist, etc. see illust. of double-framed floor,
   under double, a.
   1913 webster
see also:
gist binding joist bridging joist ceiling joist trimming joist double-framed floor 
double 

Ceiling Joist >> C Words
Ceiling Joist, definition of term: Ceiling Joist
ceiling+joist_pag1.html

Ceiling >> C Words
Ceiling, definition of term: Ceiling
ceiling_pag1.html

Joist >> J Words
Joist, definition of term: Joist
joist_pag1.html

Tail Joist >> T Words
Tail Joist, definition of term: Tail Joist
tail+joist_pag1.html