adj.
- Having the same number of sets of chromosomes as a germ cell or half as many as a somatic cell.
- Having a single set of chromosomes.
An organism having haploid cells.
[From Greek haplous, single + -OID.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.