genus

noun

ge·​nus ˈjē-nəs  ˈje- 

plural genera ˈje-nə-rə  also genuses

1

: a class, kind, or group marked by common characteristics or by one common characteristic

specifically : a category of biological classification ranking between the family and the species, comprising structurally or phylogenetically (see phylogenetic sense 2) related species or an isolated species exhibiting unusual differentiation, and being designated by a Latin or latinized capitalized singular noun

2

: a class of objects divided into several subordinate species

Synonyms

• type
• category
• kind
• species

Examples of genus in a Sentence

the crime novel, written from the criminal's perspective, is sometimes seen as a particular species of the detective story genus

Recent Examples on the Web

Grevillea is another genus of mostly Australian plants with some memorable ground covers among them. —Joshua Siskin, Oc Register, 16 Aug. 2025

The result has been an increase in products that come without legal entanglements, which means there are products that can contain other types of mushrooms, including lions mane, chaga, reishi, maitake and a genus of mushrooms called Amanita, which can be hallucinogenic. —Joshua Kellogg, The Conversation, 15 Aug. 2025

As part of the same genus as domestic dogs, coyotes may resemble a dog from a distance. —Arricca Elin Sansone, Southern Living, 1 Aug. 2025

At the time, the genus was one of the largest in the Solnhofen Archipelago, making up around 26% of the entire fish fauna. —New Atlas, 13 July 2025

Word History

Etymology

Latin gener-, genus birth, race, kind — more at kin

First Known Use

1551, in the meaning defined at sense 1

Phrases Containing genus

• form genus
• type genus

Rhymes for genus

• cleanness
• freeness
• minas
• penis
• venous
• venus
• arteriovenous
• dominus
• fraxinus
• lupinus
• ricinus
• silenus

Kids Definition

genus

noun

ge·​nus ˈjē-nəs 

plural genera ˈjen-ə-rə 

: a category of classification in biology that ranks between the family and the species, contains related species, and is named by a capitalized noun formed in Latin

Medical Definition

genus

noun

ge·​nus ˈjē-nəs  ˈjen-əs 

plural genera ˈjen-ə-rə 

: a class, kind, or group marked by common characteristics or by one common characteristic

specifically : a category of biological classification ranking between the family and the species, comprising structurally or phylogenetically related species or an isolated species exhibiting unusual differentiation, and designated by a Latin or latinized capitalized singular noun