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Added 5 October 2026

fissure

/ˈfɪʃ.ə/ noun

In Latin: rīma, fissura Wiktionary

noun Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about fissure at Wordnik → Where our words come from →

A long, narrow crack or opening made by breaking or splitting, especially in rock or earth.
A groove, deep furrow, elongated cleft or tear between body parts or in the substance of an organ.
A break or slit in tissue usually at the junction of skin and mucous membrane.

verb

To split, forming fissures.

Origin

From Middle English fissure, from Old French fissure, from Latin fissūra (“a cleft, chink”), from findō (“to cleave, split, divide”) + -tūra (nominal suffix).

From Wiktionary, via Kaikki.org (CC BY-SA)

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