Definify.com

Webster 1913 Edition

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Noun.

;

pl.

Ecthymata

(#)

[NL., fr. Gr. [GREEK] pimple, fr. [GREEK] to break out.]

(Med.)

A cutaneous eruption, consisting of large, round pustules, upon an indurated and inflamed base.

Dunglison.

ecthyma ‎(countable and uncountable, plural ecthymas or ecthymata)

An ulcerative pyoderma of the skin, caused by bacteria.
- 2007 July 7, Kim Severson, “Rounded Up in the City, Then Coddled in Style”, in New York Times:
  Lucky Lady is in isolation for a couple of weeks, trying to shake a case of contagious ecthyma, or sore mouth, a condition Ms. Coston described as lamb herpes.