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anal fissure
(medicine) A break or tear in the skin of the anal canal, resulting in bleeding and occasionally pain on defecation.
anal fissures
plural of anal fissure
sylvian fissure
(neuroanatomy) A fissure in the brain which divides the frontal lobe and parietal lobe above from the temporal lobe below.
longitudinal fissure
(neuroanatomy) A fissure in the cerebral cortex of primates; it separates the two hemispheres
orbital fissure
(anatomy) Either of two openings transmitting nerves and blood vessels to or from the orbit.
pterygomaxillary fissure
(anatomy) A vertical gap between the lateral pterygoid plate of the pterygoid process of the sphenoid bone and the maxilla that descends at right angles to the medial end of the inferior orbital fissure and gives passage to part of the maxillary artery and vein.
fissure vein
(geology) A crack in the surface of the Earth which contains mineral matter.
ape-fissures
plural of ape-fissure
fissure vents
plural of fissure vent
fissure vent
(volcanology, geology) A volcanic vent from which lava flows, with minimal explosive activity; characteristic of shield volcanoes.