protero

protero-

a combining form meaning “earlier,” “before,” “former,” used in the formation of compound words: proterotype.
Also, especially before a vowel, proter-.
Compare proto-.


Origin:
< Greek, combining form representing próteros, comparative formed from pró; see pro-2

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protero-
 
combining form
anterior or former in time, place, order, etc: proterozoic
 
[from Greek proteros fore]

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