prot-

Collins
World English Dictionary
prot-
 
combining form
a variant of proto-

proto- or (sometimes before a vowel) prot-
 
combining form
1.  indicating the first in time, order, or rank: protomartyr
2.  primitive, ancestral, or original: prototype
3.  indicating the reconstructed earliest stage of a language: Proto-Germanic
4.  indicating the first in a series of chemical compounds: protoxide
5.  indicating the parent of a chemical compound or an element: protactinium
 
[from Greek prōtos first, from pro before; see pro-²]
 
prot- or (sometimes before a vowel) prot-
 
combining form
 
[from Greek prōtos first, from pro before; see pro-²]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

prot- pref.
Variant of proto-.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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