megakaryocyte megajoule • Megalactractus · · · Info · Definitions · Characters · · megakaryocyte · · Text Latin · · Script 13 · · Length Definitions · · · (noun) a large bone marrow cell; regarded as the source of blood platelets. · · Noun Definition 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 g latin small letter g U+0067 k latin small letter k U+006B m latin small letter m U+006D o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074 y latin small letter y U+0079