noun.
The state or condition of being a polyploid; having more than the usual two homologous sets of chromosomes.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
the condition of being polyploid
Word Usage
"Although the cell's chromosome-containing nuclei divided normally, the cells themselves didn't divide, resulting in too many nuclei per cell-a condition known as polyploidy that's exhibited by many cancer cells."