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promammal
noun
pro·mammal
\(ˈ)prō+\
Definition of promammal
1 : an extinct reptile exhibiting definite mammalian characteristics; especially : a synapsid reptile
2a : a primitive mammal (as a platypus) not exhibiting all the characteristics of the group b : one of the Protomammalia
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Origin and Etymology of promammal
1pro- + mammal
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