Medical Dictionary


noun ex·pres·sion \ik-ˈspresh-ən\

Medical Definition of EXPRESSION

a :  something that manifests, represents, reflects, embodies, or symbolizes something else <the first clinical expression of a disease> b (1) :  the detectable effect of a gene; also :  the sum of the processes (as transcription and translation) by which a gene is manifested in the phenotype <gene expression can be controlled by regulatory proteins that bind to specific sites on DNA—Mark Ptashne> (2) :  expressivity
:  facial aspect or vocal intonation as indicative of feeling
:  an act or product of pressing out


How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears