Protohippus
/ˌprəʊtə(ʊ)ˈhɪpəs/Palaeontology
noun
A genus of three-toed quadrupeds related to the ancestors of the modern horse, known from North American fossil remains of the late Miocene and early Pliocene epochs; (also protohippus) an animal of this genus.
Origin
Late 19th century; earliest use found in Proceedings of the Academy of Natural Sciences of Philadelphia. From scientific Latin Protohippus from proto- + ancient Greek ἵππος horse.
- keep (or sleep in) a whole skin
- keep (or stand) guard
- keep (or stay) out of someone's way
- keep out (or keep someone/thing out)
- keep pace with
- keep quiet (or keep someone quiet)
- keep rank
- keepsake
- keep someone back
- keep someone dangling
- keep someone down
- keep someone guessing
- keep someone in
- keep someone in countenance
- keep someone in his (or her) place
- keep someone off
- keep someone posted
- keep someone sweet
- keep someone/thing off
- keep someone/thing on
- keep someone under
- keep someone up
- keep something back
- keep something dark
- keep something down