Dictionary.com
Thesaurus.com

phren-

1 American  

  1. variant of phreno- before a vowel.

    phrenic.
phren. 2 American  

abbreviation

  1. phrenological.

  2. phrenology.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.