Definition of pentad in English:
A group or set of five.
- The classic pentad in thrombotic thrombocytopenic purpura includes fever, neurologic changes, renal failure, microangiopathic hemolytic anemia and thrombocytopenia.
Mid 17th century: from Greek pentas, pentad-, from pente 'five'.
Definition of pentad in:
- US English dictionary
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