noun.
Anything that gives strength or support; a tonic.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective.
used of a medicine that is strengthening
Word Usage
"I lifted my head, opened my eyes, and spat a stream of crystal fluid like no water of Urth's; it seemed not water at all, but a richer atmosphere, corroborant as the winds of Yesod."