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.
something that is produced by a cause or agent; result. power or ability to influence or produce a result; efficacy. the condition of being operative (esp in the phrases in or into effect) take effect â to become operative or begin to produce results. basic meaning or purpose (esp in the phrase to that effect)