Entry 1 sense Webster, 1913 Angioma /(ăn`jĭ*ō"mȧ)/ · An·gi·o·ma · IPA 01 n. A tumor composed chiefly of blood or lymph vessels. pl. -omata ((-ō"mȧ*tȧ)) 1. A tumor composed chiefly of blood or lymph vessels.(Med.)