Extremely acute; marked by extreme severity of symptoms and rapid progress, as of the course of a disease. ... (05 Mar 2000) ... 
Type: Term Pronunciation: sū′pĕr-ă-kyūt′ Definitions: 1. Extremely acute; marked by extreme severity of symptoms and rapid progress, as of the course of a disease.
superacute Extremely acute; marked by extreme severity of symptoms and rapid progress, as of the course of a disease.