adjective Also, haploidic.
single; simple.
Biology. pertaining to a single set of chromosomes.
Biology. an organism or cell having only one complete set of chromosomes, ordinarily half the normal diploid number.

1905–10; hapl- + -oid

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World English Dictionary
haploid (ˈhæplɔɪd)
1.  (esp of gametes) having a single set of unpaired chromosomes
2.  a haploid cell or organism
[C20: from Greek haploeidēs single, from haplous single]

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American Heritage
Medical Dictionary

haploid hap·loid (hāp'loid')
Having the same number of sets of chromosomes as a germ cell, or half the diploid number of a somatic cell. The haploid number (23 in humans) is the normal chromosome complement of germ cells. n.
A haploid organism or cell.

hap'loi'dy (-loi'dē) n.
The American Heritage® Stedman's Medical Dictionary
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American Heritage
Science Dictionary
haploid  [%PREMIUM_LINK%]     (hāp'loid')  Pronunciation Key 
Having a single set of each chromosome in a cell or cell nucleus. In most animals, only the gametes (reproductive cells) are haploid. Compare aneuploid, diploid. See Note at mitosis.

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Example sentences
Each egg contains what is called a haploid nucleus, composed of half the chromosomes found in somatic or body cell nuclei.
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