fissi-

fissi-

pref.
1. Fission: fissiparous.
2. Split; cleft: fissipalmate.

[From Latin fissus, past participle of findere, to split; see bheid- in Indo-European roots.]

fissi-

combining form
indicating a splitting or cleft: fissirostral.
[from Latin fissus, past participle of findere to split]

fissi-

a combining form meaning “cleft” (fissiped), “fission” ( fissiparous).
[< Latin, comb. form of fissus cloven, fissum fissure]