ge·​no·​type | \ˈjē-nə-ˌtīp, ˈje-\

Definition of genotype 

(Entry 1 of 2)

1 [ ISV gen- ] : type species

2 [ ISV gene ] : all or part of the genetic constitution of an individual or group — compare phenotype


genotyped; genotyping; genotypes

Definition of genotype (Entry 2 of 2)

transitive verb

: to determine all or part of the genetic constitution of Because many Icelanders have now been genotyped, meaning their DNA has been analyzed at many sites spaced across the genome, the Decode researchers were able to pick a set of 40 sites where the DNA variations were diagnostic of geographic origin.— Nicholas Wade Genotyping of multiple B. pseudomallei colonies from several tissue sites from four patients … showed substantial genetic diversity within a single patient …— W. Joost Wiersinga

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Other Words from genotype


genotypic \ ˌjē-​nə-​ˈti-​pik , ˌje-​ \ or less commonly genotypical \ ˌjē-​nə-​ˈti-​pi-​kəl , ˌje-​ \ adjective
genotypically \ ˌjē-​nə-​ˈti-​pi-​k(ə-​)lē , ˌje-​ \ adverb

Examples of genotype in a Sentence

Recent Examples on the Web: Noun

Investigators’ recent break in the case came after sending in 25-year-old DNA evidence from the crime scene to Parabon NanoLabs to create a genotype of the killer who got away. Jared Gilmour, miamiherald, "Teacher was raped and murdered in 1992. Gum left at a school just caught the killer, Pa. cops say," 27 June 2018 And according to a phylogenetic tree mapping the evolutionary relationship between the genomes, one of the nine major genotypes circulating today was the product of an ancient recombination between two strains of the hepatitis B virus. Kiona N. Smith, Ars Technica, "Genghis Khan’s Mongol horde probably had rampant Hepatitis B," 11 May 2018 Previous studies have hinted at as much based on inferences from modern genotypes, notes Jonathan Pritchard, a population geneticist at Stanford University in Palo Alto, California, who wasn’t involved in the work. Michael Price, Science | AAAS, "Iceland’s founding fathers underwent a rapid, 1000-year genetic shift," 31 May 2018 None of the analyses currently incorporate genotype-environment interactions like those found in the schizophrenia study. Sharon Begley, STAT, "Schizophrenia ‘risk genes’ are not so risky if the mother’s pregnancy was healthy," 28 May 2018 One modern strain, genotype A, was previously thought to have emerged in Africa and spread to the Americas and India within the last few centuries via the slave trade. Kiona N. Smith, Ars Technica, "Genghis Khan’s Mongol horde probably had rampant Hepatitis B," 11 May 2018 The same is true of the treatment ratings: Customers can sort them by reported efficacy and popularity, but not by their own genotype. Megan Molteni, WIRED, "23andMe Wants You to Share Even More Health Data," 20 Apr. 2018 There were no statistically significant differences in success or failure among the genotypes in either dieting group. Beth Mole, Ars Technica, "Low-carb vs low-fat? Both led to ~12lb loss after a year, regardless of genes," 23 Feb. 2018 Ultimately the subjects' genotypes did not appear to influence their responses to the diets. Author: Anahad O'connor, Anchorage Daily News, "Counting calories is not the key to weight loss, a new study finds," 22 Feb. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'genotype.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of genotype


1897, in the meaning defined at sense 1


1946, in the meaning defined above

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Statistics for genotype

Last Updated

19 Sep 2018

Look-up Popularity

Time Traveler for genotype

The first known use of genotype was in 1897

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More Definitions for genotype


ge·​no·​type | \ˈjē-nə-ˌtīp, ˈjen-ə- \

Medical Definition of genotype 

(Entry 1 of 2)

2 : all or part of the genetic constitution of an individual or group — compare phenotype

Other Words from genotype

genotypic \ ˌjē-​nə-​ˈtip-​ik , ˌjen-​ə-​ \ also genotypical \ -​i-​kəl \ adjective
genotypically \ -​i-​k(ə-​)lē \ adverb


transitive verb
genotyped; genotyping

Medical Definition of genotype (Entry 2 of 2)

: to determine the genotype of DNA samples from the participants were genotyped for two common single-nucleotide polymorphisms (SNPs) in the coding region of the vitamin D–binding protein gene …— Camille E. Powe et al., The New England Journal of Medicine, 21 Nov. 2013

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Comments on genotype

What made you want to look up genotype? Please tell us where you read or heard it (including the quote, if possible).


to clear from alleged fault or guilt

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