Select Page



1. The irreversible condensation of chromatin in the nucleus of a cell undergoing necrosis or apoptosis. (

2. Cytologic characteristics of the nucleus of a cell that is in the process of programmed or induced cell death. (

3. Cytologic characteristics of the superficial or cornified cells of stratified squamous epithelium in which there is shrinkage of the nuclei and condensation of the chromatin into structureless masses. (

Syn: Pyknosis

Word origin: From Greek karyon “nut, kernel,” + from Greek kinesis “movement, motion”

Related entries

Struggling in Biology?

Are You Premed?

Confused about the MCAT? Not sure how to prepare? This guide will show you how