As nouns the difference between terms and aptychus
is that terms is while aptychus is a marine fossil consisting of a hard anatomical structure like a curved shelly plate, once part of the body of an ammonite.
terms
English
Noun
(head)
Statistics
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aptychus
English
Noun
(
wikipedia aptychus)
(
aptychi)
A marine fossil consisting of a hard anatomical structure like a curved shelly plate, once part of the body of an ammonite.
Related terms
* anaptychus