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

This delicate exterior is indicative of the animal’s genus, Amphigymnas, which includes species with the same fragile skin, according to the study. —Irene Wright, Miami Herald, 14 Mar. 2025

One genus, Pereskia, native to tropical settings of South America, has true glossy green leaves. —Neil Sperry, Fort Worth Star-Telegram, 14 Mar. 2025

Using data from nearly 10,000 herbarium specimens, scientists at the Smithsonian’s National Museum of Natural History have brought attention to the conservation status of these plants, revealing that 87 species—almost half of the genus—are now classified as threatened with extinction. —Ella Jeffries, Smithsonian Magazine, 7 Mar. 2025

To improve food security, researchers are currently mapping out the genomes of 22 crops in the nightshade genus, which includes tomatoes, potatoes, eggplants and peppers. —Michael Irving, New Atlas, 5 Mar. 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