hemangiectasis

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

Medical Definition of hemangiectasis 

: dilatation of blood vessels

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