GTT (gestational trophoblastic tumor): gestational trophoblastic tumor, invasive mole, choriocarcinoma and placental trophoblastic tumor are collectively called gestational trophoblastic tumor. GTT (glucose tolerance test): ogtt (oral glucose tolerance test): oral glucose tolerance test gtt (gaz transport &; Technigaz): GTT Company of France is the owner of tank membrane technology of LNG carriers in the world. At present, the shipyards manufacturing LNG ships in the world mainly adopt its technology GTT(Good think technology): GTT Electronics of Korea, a comprehensive company engaged in the research, development, production and sales of high-tech electronics, the founder of after-bath drying equipment, and the owner of the core technology of after-bath drying machine; Pioneer of new hand disinfection equipment using pure plant extract (sanigene) as disinfectant. GTT (transient thyrotoxicosis in pregnancy)