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ammonoid
释义
WordReference Random House Unabridged Dictionary of American English © 2024
am•mo•noid
(am
′
ə noid′),
USA pronunciation
n.
Paleontology
any cephalopod mollusk of the extinct order Ammonoidea, from the Devonian to the Cretaceous periods, having a coiled, chambered shell.
Neo-Latin
Ammonoidea,
equivalent. to
Ammon
(
ites
) name of the order +
-oidea
-
oidea;
see
ammonite
2
1880–85
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