from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A multiple of the basic number of chromosomes in a cell.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The number of homologous sets of chromosomes in a cell.
From diploidy and haploidy.(American Heritage® Dictionary of the English Language, Fourth Edition)
From the ending of words such as haploidy, polyploidy etc. (Wiktionary)