|a fool or simpleton; ninny.|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
Salk (sôlk), Jonas. Born 1914.
American microbiologist who developed (1954) the first effective killed-virus vaccine against polio.
|Salk (sôlk) Pronunciation Key
American microbiologist who in 1954 developed the first effective vaccine against polio, using an inactivated form of the virus. Salk's vaccine, which was administered by injection, was widely used until 1959 when Albert Sabin introduced an orally administered vaccine derived from a live form of the virus.