variants or phreni- or phreno-
1
: mind
phrenology
2
a
: diaphragm
phrenic
b
: diaphragmatic and
phrenocardiac
3
: phrenic nerve
phreniclasia

Word History

Etymology

Latin phren-, from Greek phren-, phreno-, from phren-, phrēn diaphragm, mind

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

  1. Expanded definitions
  2. Detailed etymologies
  3. Advanced search tools
  4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now

Browse Nearby Words

Cite this Entry

“Phren-.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/phren-. Accessed 10 Jun. 2026.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

More from Merriam-Webster