tri-, = three times, thrice;
findo, fidi, fissum = to cleave, split, part, separate, divide; a cleft, slit, fissure.
(split-)
trifidus, = cleft or cloven into three parts, three-cleft, three-forked.
(divided (usually within outer third))
(leaves are divided to form three lobes)
(
LS,
ld,
BL,
An)