- ammonoids
- n. extinct cephalopod mollusk
English contemporary dictionary. 2014.
ammonoids
Look at other dictionaries:
Triassic Period — Interval of geologic time, с 248–206 million years ago, that marks the beginning of the Mesozoic Era. Many new vertebrates emerged during the Triassic, heralding the major changes that were to occur in both terrestrial and marine life forms… … Universalium
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ammonoid — /am euh noyd /, n. any cephalopod mollusk of the extinct order Ammonoidea, from the Devonian to the Cretaceous periods, having a coiled, chambered shell. [1880 85; < NL Ammonoidea, equiv. to Ammon(ites) name of the order + oidea OIDEA; see… … Universalium
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