rbc rb • rbi · · · Info · Definitions · Synonyms · Characters · · rbc · · Text Latin · · Script 3 · · Length 1 · · Syllables Definitions · · · (noun) a mature blood cell that contains hemoglobin to carry oxygen to the bodily tissues; a biconcave disc that has no nucleus. Synonyms: red blood cell, RBC, erythrocyte. · · Noun Definition 1 Synonyms · · · red blood cell · · Synonym 1 erythrocyte · · Synonym 2 Characters · · b latin small letter b U+0062 c latin small letter c U+0063 r latin small letter r U+0072