umbratical

So I can see whole volumes dispatched by the umbratical doctors on all sides: but draw these forth into the just lists: let them appear sub dio, and they are changed with the place, like bodies bred in the shade; they cannot suffer the sun or a shower, nor bear the open air; they scarce can find themselves, that they were wont to domineer so among their auditors: but indeed I would no more choose a rhetorician for reigning in a school, than I would a pilot for rowing in a pond.

Discoveries Made Upon Men and Matter and Some Poems Ben Jonson 1605