The Collaborative International Dictionary
Trispast
Trispast \Tri"spast\, Trispaston \Tri*spas"ton\, n. [NL.
trispaston, fr. Gr. ? drawn threefold; ? (see Tri-) + ? to
draw.] (Mech.)
A machine with three pulleys which act together for raising
great weights.
--Brande & C.
Wiktionary
trispast
n. A machine with three pulleys which act together to raise great weights.