quintan adjective & noun.
['kwɪnt(ǝ)n] Now
rare or
obsolete.
M17.[medieval Latin quintana (sc. febris fever) use as noun of fem. of quintanus, from quintus fifth: see -AN. Cf. QUARTAN, SEXTAN.]Medicine. (Designating) a fever recurring every fourth day (by inclusive reckoning every fifth day).
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