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Pustulent (adjective)
Filled or oozing with pus
“a pustulent sore”
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Pustulent (adjective)
alternative spelling of pustulant|nodot=yes, “producing pustules”
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Pustulant (adjective)
Producing pustules.
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Pustulant (noun)
Any medicine that produces pustules.
“Croton oil is a pustulant.”
Wiktionary
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Pustulant (adjective)
Originally: causing the formation of pustules (now rare). Later: affected with pustules; pustular.
Oxford Dictionary