hemangiectasis

noun
he·​man·​gi·​ec·​ta·​sis
variants: or chiefly British haemangiectasis \ ˌhē-​ˌman-​jē-​ˈek-​tə-​səs How to pronounce haemangiectasis (audio) \
plural hemangiectases\ -​ˌsēz How to pronounce hemangiectases (audio) \

Medical Definition of hemangiectasis

: dilatation of blood vessels