Haploid (adjective)

1. Describing a cell or organism that has a single set of chromosomes, as opposed to the paired set found in diploid cells or organisms.
2. Having a single set of chromosomes in the cells, as opposed to the paired set found in diploid cells or organism.

Origin:

From greek haploos ("single, simple") + -oid.

Examples:

1. Haploid cells are produced during meiosis.
2. The sperm and egg are both haploid cells.
3. Haploid organisms have half the number of chromosomes as diploid organisms.
4. Haploid plants are produced by apomixis.
5. Haploid cells are important for genetic diversity in sexual reproduction.