# phenotypic

/ˌfinəˈtɪpɪk/ (US) · CEFR C2 · Adjective

Source: https://englishreference.com/word/phenotypic
Updated: 2026-10-13

## Definition

describing the physical traits or features of a living thing that you can actually see. It is used to talk about how an organism looks or acts because of its genes and its environment.

For teachers: Relating to the observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences. Often used in contrast to genotypic, which refers to the underlying genetic code.

## Examples

- The two plants show different phenotypic traits despite having the same genes.
- Researchers observed phenotypic changes in the fish population after the water temperature rose by three degrees.
- The study aims to distinguish between phenotypic plasticity, where one genotype produces multiple forms, and true evolutionary adaptation resulting from selective pressures.

## Usage notes

- Typically used in scientific or academic contexts; often precedes nouns like 'traits', 'characteristics', or 'expression'.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.