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.
[1913 Webster]