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Webster 1913 Edition

Adj.

[L.

quintanus

, fr.

quintus

fifth,

quinque

five. See

Occurring as the fifth, after four others also, occurring every fifth day, reckoning inclusively;

as, a

quintan

fever

–

Noun.

(Med.)

An intermittent fever which returns every fifth day, reckoning inclusively, or in which the intermission lasts three days.

quintan ‎(not comparable)

quintan ‎(plural quintans)