i Register
In some senses, febricant is marked as archaic. Watch for register when choosing this word.
adj
Causing fever.
noun
A patient who has a fever.
Gavaret mathematically demonstrated in 1839 the increase of body-heat when the febricant shivers with cold, and its precedence of some hours before the chill, by which signs the therapeutist is warned in time to administer the antidote.