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'.

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Word of the day skosh
Pronunciation: skəʊʃ
noun
a small amount; a little