angioma, pi. angio'mat a

(an-ji-o'mah) [G. angeion, ve el, -oma.] A swelling or tumor due to dilatation of the blood-ve els (hemangioma) or lymphatics (lymph angioma), a. caTemo's um, cavernous a., cavemoma; a vascular erectile tumor containing large blood-filled spaces due apparently to dilatation and thickening of the walls of the capillary loops, a. cu'tis, an extreme form of nsevus vascular is, hypertrophic nevus, in which the tumor is formed of a network of widely dilated blood-ve els, a. hypertroph'icum, hypertrophic a., a tumor formed of capillary ve els and of solid cylinders caused by hyperplasia of the endothelium, a. serpigino's um, infective a., the presence of rings of red dots on the skin, which tend to widen peripherally, due to proliferation, with subsequent atrophy, of the superficial capillaries, a. sim'plex, simple a., a new growth characterized by the formation of new, usually dilated, capillaries with thickened wall due to an overgrowth of the endothelium, a. Teno's um racemo's um, the appearance (tortuous swelling) caused by varicosities of superficial veins, infec'- tive a., a. serpiginosum. plex'ifonn a., a., cutis.