noun🔗ShareAny of a group of simple proteins, soluble in water only in the presence of salts, that are coagulated by heat; one of the two parts of haemoglobin."The blood test revealed that her globulin levels were low, which could indicate a problem with her immune system. "medicinephysiologybiochemistrybodysubstancechemistrysciencebiologyorganismChat with AIVocabulary GamePractice Reading