— fissural , adj. — fissureless , adj.
/fish"euhr/ , n. , v. , fissured, fissuring .
n.
1. a narrow opening produced by cleavage or separation of parts.
2. cleavage (def. 1).
3. Anat. a natural division or groove in an organ, as in the brain.
v.t.
4. to make fissures in; cleave; split.
v.i.
5. to open in fissures; become split.
[ 1375-1425; late ME fissura cleaving, cleft, fissure, equiv. to fiss ( us ) divided (see FISSI-) + -ura -URE ]