Definitions
Century Dictionary and Cyclopedia
- n. One of the heart-shaped plates divided by a suture found in some fossil cephalopods, as goniatites and ammonites.
Wiktionary
- n. paleontology One of a pair of shelly plates found in some cephalopods, such as the ammonites.
GNU Webster's 1913
- n. (Paleon.) One of a pair of shelly plates found in some cephalopods, as the ammonites.
Etymologies
- New Latin, from Ancient Greek for "unfolding". (Wiktionary)
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Words of Dinosaurology
This quickly got bigger and weirder than originally intended, so now it's housing terms that relate to the study of dinosaurs and other prehistoric creatures. See also Dinosaurs, Pterosaurs, Ichthy...
zygopophyses, ziphodont, plesiomorphic, cleidoic, endothermy, ectothermy, viviparous, vertebrae, cervical, dorsal, sacral, caudal and 628 more...
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chained_bear Compare aptychus. Sep 3, 2008