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haploid

American  
[hap-loid] / ˈhæp lɔɪd /

adjective

  1. single; simple.

  2. Biology. pertaining to a single set of chromosomes.


noun

  1. Biology. an organism or cell having only one complete set of chromosomes, ordinarily half the normal diploid number.

haploid British  
/ ˈhæplɔɪd /

adjective

  1. (esp of gametes) having a single set of unpaired chromosomes

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

noun

  1. a haploid cell or organism

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
haploid Scientific  
/ hăp′loid′ /
  1. Having a single set of each chromosome in a cell or cell nucleus. In most animals, only the gametes (reproductive cells) are haploid.

  2. Compare aneuploid diploid See Note at mitosis


Other Word Forms

Etymology

Origin of haploid

First recorded in 1905–10; hapl- ( def. ) + -oid

Vocabulary lists containing haploid

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Genomic sequencing also revealed that D. catalonica has a haploid chromosome number of four autosomes plus one X chromosome, while D. tilosensis has six autosomes and one X chromosome.

From Science Daily ● Nov. 2, 2025

In bees, males are typically haploid and have only one set of chromosomes, but when they're inbred, they can have two sets of the same chromosomes and lack genetic diversity.

From Science Daily ● Apr. 4, 2024

In this case, the ants have haploid cells from two divergent lineages: R and W. Humans, for example, have X and Y haploid cells.

From Salon ● Jul. 24, 2023

Three of these degenerate in each cell, leaving one micronucleus that then undergoes mitosis, generating two haploid micronuclei.

From Textbooks ● Jan. 1, 2015

The egg nucleus, now known as the female pronucleus, and each body contain the reduced or haploid number of chromosomes.

From Being Well-Born An Introduction to Eugenics by Michael F. Guyer

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