English Reference

Word

phenotype

Phoneticsphe·no·type, stress on the first syllable

US/ˈfinəˌtaɪp/

UK/fˈɛnətˌaɪp/

Definitions

01observable characteristics

C1 · Advanced Countable noun Science Technical

n. the set of physical traits you can see in a living thing, like its height, hair colour, or how it behaves.

n. the observable physical, physiological, or behavioural characteristics of an organism, resulting from the interaction of its genotype with the environment.

“The plant's phenotype included bright red flowers and very short stems.”

“Researchers observed that the identical twins developed different phenotypes in adulthood due to their contrasting diets and exercise habits.”

Antonyms

02to classify by traits

C2 · Proficiency Science Technical

v. to study or group living things based on their physical characteristics.

v. to determine, evaluate, or classify an organism based on its observable physical or biochemical traits.

“The scientists had to phenotype each mouse before starting the next stage of the experiment.”

“The laboratory team spent months phenotyping the various bacterial strains to identify which ones were resistant to the new antibiotic.”

Usage

This verb is almost exclusively used in laboratory or clinical research contexts.

Real-World Examples

“When the genotype of a bacterial strain is known, its measured behavior can also be linked to its genetic background, connecting genotype with virulence phenotype.”
Phys.org 1 Oct 2026
“Using a computer model, she selected 14 locations on the DNA where these markers differed across sex phenotypes.”
Phys.org 26 Aug 2026

Etymology

From pheno- + -type. (Date to be specified). From Ancient Greek φαίνω (phaínō, “to shine, to show, to appear”) and Ancient Greek τύπος (túpos, “mark, type”).

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

Word family

NOUN

phenotype(C1)

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.C1 AdvancedIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.7.0–8.0TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 5.0–5.595–113TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.945–990
Frequency
Occasional
Level
C1 · Advanced
Updated

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