ecthyma

noun

ec·​thy·​ma ek-ˈthī-mə 

1

: a cutaneous eruption marked by large flat pustules that have a hardened base surrounded by inflammation, heal with pigmented scar formation, and occur especially on the lower legs

2

: sore mouth of sheep

ecthymatous

ek-ˈthim-ət-əs  -ˈthīm- 

adjective