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protero-

  1. a combining form meaning “earlier,” “before,” “former,” used in the formation of compound words:

    proterotype.



protero-

combining_form

  1. anterior or former in time, place, order, etc

    proterozoic

“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of protero-1

< Greek, combining form representing próteros, comparative formed from pró; pro- 2
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Word History and Origins

Origin of protero-1

from Greek proteros fore

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