While flipping through the dictionary on an unrelated quest, I came across this thing of beauty:
sudoriparous secreting sweat; pertaining to the secretion of sweat or to the sweat glands
Needless to say, this is going into my next book.
"His nine millimetre Browning he kept in a holster beneath his sudoriparous armpit."
The floor is now open for the most gratuitous use of sudoriparous.