Simple Definition of pus

from our Learner's Dictionary

pus

noun

ˈpʌs

medical : a thick, yellowish substance that is produced when a part of the body or a wound becomes infected

Pus oozed from the cat's injured ear.

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“Pus.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/pus. Accessed 15 Jun. 2026.

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