synapsid
sy·nap·sid
noun
Origin
From translingual Synapsida, from syn- + Ancient Greek ἁψίς (hapsís, “arch”).
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.