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early 15c., from Latin putridus, from putrere "to rot," from putris "rotten, crumbling," related to putere "to stink," from PIE root *pu- "to rot, stink" (see pus). First in reference to putrid fever, an old name for typhus (also known in Middle English as putrida). Related: Putrification.
putrid pu·trid (pyōō'trĭd)
Decomposed; foul-smelling; rotten.
Proceeding from, relating to, or exhibiting putrefaction.