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English definition of “ammonite”

ammonite

noun [C]     /ˈæm.ə.naɪt/ specialized
an extinct sea creature (= one that no longer exists) often found as a fossil (= an animal turned into rock), with a flat, spiral shellPalaeontology and fossils
(Definition of ammonite noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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