Urticariaâthe scientific name for hivesâis an outbreak of red, swollen, and itchy welts that form on the skin. Hives appear suddenly and can appear anywhere on the body, including the face, lips and throat. They typically vary in size, and may join together to form larger welts.
Define effectivity. effectivity synonyms, effectivity pronunciation, effectivity translation, English dictionary definition of effectivity. adj. 1. a. Having an intended or expected effect. b. Producing a strong impression or response; striking: gave an effective performance as Othello.
Expressivity. Definition. noun. The extent to which an expressed gene manifests its effect in an organism. Supplement. Expressivity refers to the influence of an expressed gene in individuals.A variable expressivity pertains to the consistency of the geneâs influence on the individual. It occurs when a phenotype is expressed but to a different degree among individuals with the same genotype.efinition. noun. The extent to which an expressed gene manifests its effect in an organism. Supplement. Expressivity refers to the influence of an expressed gene in individuals.