protomammal
noun
(An informal name for) a hypothetical primitive mammal or a known evolutionary ancestor of the mammals.
Origin
1930s.
- polytypage
- polytype
- polytyped
- polytypic
- polytypical
- polytypism
- polytypy
- polyubiquitin
- polyunsaturated
- polyunsaturates
- polyunsaturation
- polyuresis
- polyurethane
- polyuria
- polyuric
- polyuronide
- polyvalence
- polyvalent
- polyversity
- polyvinyl
- polyvinyl acetal
- polyvinyl acetate
- polyvinyl alcohol
- polyvinyl butyral
- polyvinyl chloride