Affixes

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.