Webster’s Revised Unabridged Dictionary · 1913
Corroborant
Cor·rob′o·rant (k?r-r?b′?-rant), a. [L. corroborans, p. pr. See Corroborate.] Strengthening; supporting; corroborating. Bacon. — n. Anything which gives strength or support; a tonic.
The brain, with its proper corroborants, especially with sweet odors and with music. Southey.