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ridged

/ˈɹɪd͡ʒd/ adjective

adjective Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about ridged at Wordnik → Where our words come from →

  1. Having a ridge or shaped like a ridge or suggesting the keel of a ship.
    a carinate sepal

Origin

From Middle English rigged, riggid, ryggyd, rugged, equivalent to ridge + -ed.

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