a. (UN-1 7 b.)
1721. Cheyne, Ess. Gout, 22. By carrying out of the Habit, the more gross and unperspirable Remains of the Gouty Humour.
1733. Arbuthnot, Ess. Effects Air, vi. 155. Bile, of it self, is the most unperspirable of Animal Fluids; it stops at the Surface of the Skin, and discolours it.