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prot(o)-

prefix
 
 
/prəʊ.təʊ-/ US  /proʊ.t̬oʊ-/

Definition

first, especially from which other similar things develop; original: protoplasm a prototypeFirst and firstly
(Definition of prot(o)- prefix from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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