Glucose Tolerance Test (GTT). GTT is an abbreviation for Glucose Tolerance Test, which is a measure of the amount of glucose present in the blood stream of a person at the time the test is taken. This test is usually done to check for glucose related problems like hyperglycemia or hypoglycemia in the patient.
Contemporary R&B, also known as simply R&B, is a music genre that combines elements of rhythm and blues, soul, funk, pop, hip hop and dance.
â¢ R AND B (noun) The noun R AND B has 1 sense: 1. a combination of blues and jazz that was developed in the United States by Black musicians; an important precursor of rock 'n' roll. Familiarity information: R AND B used as a noun is very rare. Dictionary entry details.