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

• bracket
• category
• class
• classification
• division
• family
• grade
• group
• kind
• league
• order
• rank(s)
• rubric
• set
• species
• tier
• type

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

But limited material has prevented the researchers from unequivocally assigning the fossil to a new species or genus. —Newsweek, 4 Nov. 2024

This genus is primarily known for its small but brightly colored amphibian species that are highly poisonous, most notably, the bright orange pumpkin toadlets, B. rotenbergae, B. ephippium and B. pitanga (more here). —Grrlscientist, Forbes, 1 Nov. 2024

Probiotics are classified by strain, which includes the genus, species, subspecies (if applicable), and a strain designation. —Lainey Younkin, Ms, Rd, Health, 16 Sep. 2024

Its head is also much larger than other species in the genus. —Thomas G. Moukawsher, Newsweek, 30 Nov. 2024

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

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