aptychus

名词 n.
中文释义

英文释义

名词 n.
  1. A hard calcareous plate forming part of the body of an ammonite.
    — It wasn't until the 1970s that paleontologists had amassed enough evidence to be certain that aptychi were modified lower jaws.

词形变化

aptychi plural

词源

Modern Latin, from a- + Ancient Greek πτυχή (ptukhḗ, “fold, layer”).
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