- the action of a gene in the production of a protein or a phenotype.
- expressivity(def 2).
Origin of expression
Examples from the Web for expressional
The expressional changes of pitch, which constitute the 'melody,' or the 'inflections' of the sentences, play an important part.
He would have none of a formal and merely decorative beauty—a beauty serving no expressional need of the heart or the imagination.Edward MacDowell|Lawrence Gilman
The expressional impulse is not satisfied by the resonance which an occasional public, however sympathetic, is able to afford.
As a result of this craving the expressional activities lead to artistic production.
Yet it was these emotional, expressional women that Annabel Vyner naturally joined.I, Thou, and the Other One|Amelia Edith Huddleston Barr