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-fid

Divided in a specified way or into a specified number of parts.

Latin fidus, cleft or split.

Something trifid (Latin tri‑, three), less commonly trefid, is partly or wholly split into three divisions or lobes (not to be confused with a triffid, a predatory plant moving on three legs, invented by John Wyndham in The Day of the Triffids); similarly something bifid (Latin bi‑, two) is divided by a deep cleft or notch into two parts; a leaf that is pinnatifid (Latin pinnatus, feathered) has leaflets arranged on either side of the stem, but not divided all the way down to the central axis.

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