fissure

nouns

a long narrow depression in a surface
chap, crack, cranny, crevice, fissure
a long narrow opening
cleft, crack, crevice, fissure, scissure
(anatomy) a long narrow slit or groove that divides an organ into lobes
fissure
domain category
the branch of morphology that deals with the structure of animals
anatomy, general anatomy
is a type of (narrower)
(anatomy) any furrow or channel on a bodily structure or part
groove, vallecula

verbs

break into fissures or fine cracks
fissure
is a type of (narrower)
cause to become cracked
"heat and light cracked the back of the leather chair"
crack