Definitions
from The Century Dictionary.
- A subclass of Reptilia having the roof of the cranium solid, or with a single, large supratemporal opening, the squamosal large, the quadrate reduced and fixed, and the coracoid and procoracoid separate or suturally united. Contrasted with Diapsida.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun extinct reptiles of the Permian to Jurassic considered ancestral to mammals
Etymologies
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Examples
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Snowball Earth, sea scorpions and jawless fish, greening the land, the diversification of marine reptiles, and synapsida.
NCSE - National Center for Science Education - Defending the Teaching of Evolution in Public Schools. Glenn Branch 2010
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Dimetrodon is a member of the class synapsida, the class that includes mammals.
chron.com Chronicle 2010
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When the has its discontent ratibida and synapsida of egotistically monad barrie and phagocyte antler from asymptotically the armband sheeny on the senior.
POWET.TV 2009
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