Definition of RAST
RAST: Radioallergosorbent test, an allergy test that is done on a sample of blood. RAST is used to check for allergic sensitivity to specific substances.Source: MedTerms™ Medical Dictionary
Last Editorial Review: 3/19/2012
Medical Dictionary Definitions A - Z
Search Medical Dictionary
eMedicineHealth Top News
Allergies & Asthma
Improve treatments & prevent attacks.