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prot-

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  1. variant of proto- before a vowel: protamine.

Prot.

  1. Protestant.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for prot

prot-

combining form
  1. a variant of proto-

Prot.

abbreviation for
  1. Protestant
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

Word Origin and History for prot

Prot

n.

colloquial shortening of Protestant (n.), used by Catholics, often contemptuous.

Online Etymology Dictionary, © 2010 Douglas Harper

prot in Medicine

prot-

pref.
  1. Variant ofproto-