Dictionary.com
Thesaurus.com

karyo-

American  

  1. a combining form meaning “nucleus of a cell,” used in the formation of compound words.

    karyotin.
karyo- British  

combining form

  1. indicating the nucleus of a cell

    karyogamy
"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

Etymology

Origin of karyo-

< Greek, combining form of káryon nut, kernel

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.