Definitions
from The Century Dictionary.
- noun One of the heart-shaped plates divided by a suture found in some fossil cephalopods, as goniatites and ammonites.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Paleon.) One of a pair of shelly plates found in some cephalopods, as the ammonites.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun paleontology One of a pair of
shelly plates found in somecephalopods , such as theammonites .
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
New Latin, from Ancient Greek for "unfolding".
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Examples
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chained_bear commented on the word anaptychus
Compare aptychus.
September 3, 2008