Definition of proto- in English:

proto-

Pronunciation: /ˈprəʊtəʊ/
(usually prot- before a vowel)

combining form

1Original or primitive: prototherian prototype
1.1First or earliest: protomartyr protozoon

Origin

from Greek prōtos 'first'.

Definition of proto- in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day flippant
Pronunciation: ˈflɪp(ə)nt
adjective
not showing a serious or respectful attitude