fissure

Noun
  1. A long narrow depression in a surface (synset 113930286)
    is a type of: depression, impression, imprint - a concavity in a surface produced by pressing
    same as: chap, crack, cranny, crevice
  2. A long narrow opening (synset 109281621)
    is a type of: gap, opening - an open or empty space in or between things
    subtypes:
    • chap - a crack in a lip caused usually by cold
    • chink - a narrow opening as e.g. between planks in a wall
    • crevasse - a deep fissure
    • fatigue crack - a crack in metal resulting from metal fatigue
    • break, fault, faulting, fracture, geological fault, shift - (geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other
    • rift - a narrow fissure in rock
    • slit - a narrow fissure
    • split - a lengthwise crack in wood
    • vent, volcano - a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt
    same as: cleft, crack, crevice, scissure
  3. (anatomy) a long narrow slit or groove that divides an organ into lobes (synset 105230663)
    referred to in: anatomy, general anatomy - the branch of morphology that deals with the structure of animals
    is a type of: groove, vallecula - (anatomy) any furrow or channel on a bodily structure or part
    subtypes:
    • sulcus - (anatomy) any of the narrow grooves in an organ or tissue especially those that mark the convolutions on the surface of the brain
    • hilum, hilus - (anatomy) a depression or fissure where vessels or nerves or ducts enter a bodily organ
Verb
  1. Break into fissures or fine cracks (synset 200337732)
    is a type of: crack - cause to become cracked

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