As a proper noun sexton
As an adjective sextan is
(obsolete|medicine) that recurs on the sixth day.
As a noun sextan is
(obsolete|medicine) such a fever.
Other Comparisons: What's the difference?
A church official who looks after a church building and its graveyard and may act as a gravedigger and bell-ringer.
(obsolete, medicine) That recurs on the sixth day
(obsolete, medicine) Such a fever