karyo-

1.
a combining form meaning “nucleus of a cell,” used in the formation of compound words:
karyotin.
Also, caryo-.
Origin
< Greek, combining form of káryon nut, kernel
British Dictionary definitions for karyo-

karyo-

combining form
1.
indicating the nucleus of a cell: karyogamy
Word Origin
from New Latin, from Greek karuon kernel, nut
Word Origin and History for karyo-

before vowels kary-, word-forming element used since c.1874 in biological terms referring to cell nuclei, from Greek karyon "nut, kernel," possibly from PIE root *kar- "hard" (see hard (adj.)).

karyo- in Medicine

karyo- or caryo-
pref.
Cell nucleus: karyogamy.