English Reference

Word

genus

US/ˈdʒinəs/

UK/dʒˈɛnəs/

Definitions

01biological classification

C1 · Science

n. a group of animals or plants that are very similar to each other. It is the first part of a living thing's scientific name.

n. a taxonomic category ranking below a family and above a species and generally consisting of structurally or phylogenetically related species.

“The lion and the tiger both belong to the same genus, which is called Panthera.”

“In binomial nomenclature, the first name identifies the genus to which the species belongs, while the second name identifies the specific species within that group.”

Technical

Usage

The genus name is always capitalized and italicized in scientific writing.

02a general type

C2

n. a general class or kind of something that can be divided into smaller groups.

n. a class of objects or concepts divided into several subordinate species; a group with common attributes.

“The professor argued that this specific problem belongs to a broader genus of social issues.”

“The philosopher attempted to define the genus of the concept before moving on to the specific differences that distinguish its various species.”

Formal · Academic

Synonyms

03Ancient Greek music

C2 · Music

n. a specific way of tuning or arranging notes in Ancient Greek music.

n. any of the three types of tuning or intonation used within an Ancient Greek tetrachord: diatonic, chromatic, or enharmonic.

“The musician studied how the chromatic genus was used in ancient songs.”

“The theorist explained that each genus of the tetrachord offered a distinct melodic character, though the outer notes remained fixed in pitch.”

Technical · Archaic

Real-World Examples

“Scientists have named a newly discovered beetle genus Luffy, inspired by the stretchy hero of the manga and anime One Piece.”
ScienceDaily · 4 Aug 2026
“The genus is also widely thought to be an obligate anaerobe, incapable of surviving in the presence of oxygen.”
Phys.org · 14 Aug 2026

Etymology

Etymology tree Proto-Indo-European *ǵenh₁- Proto-Indo-European *-os Proto-Indo-European *ǵénh₁os Latin genusbor. English genus Borrowed from Latin genus (“birth, origin, a race, sort, kind”) from the root gen- in Latin gignō (“to beget, produce”). Doublet of gender and genre, further related to kin.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

genotypeNoungenusNoun

Related words

Domains

BiologyMusic

This entry

Level
C1 · Advanced
Frequency
Frequent
Updated

Scan code

englishreference.com/q/genus

English Reference