Definition of "corroborant"

There be divers sorts of bracelets fit to comfort the spirits ; and they be of three intentions ; refrigerant , corroborant , and aperient

1631, Francis [Bacon], “X. Century.”, in Sylua Syluarum: Or A Naturall Historie. In Ten Centuries. […], 3rd edition, London: […] William Rawley; [p]rinted by J[ohn] H[aviland] for William Lee […]

The sensible qualities of argentina promise no great virtue of this kind; for to the taste it discovers only a slight roughishness, from whence it may be presumed to be entitled to a place only among the milder corroborants.

1778, William Lewis, The New Dispensatory, page 91

Next to this it is imported to comfort the stomach, and to cherish the root of man, that is to say the brain, with its proper corroborants, especially with sweet odours and with music.

1847, Robert Southey, “Chapter CCXVII. Some Account of D. Oliva Sabuco’s Medical Theories and Practice.”, in John Wood Warter, editor, The Doctor, &c., volume VII, London: Longman, Brown, Green, and Longmans, page 186

As a scrupulous and faithful antiquary, Morales was accustomed to require evidence, and to investigate it; and for these he could find no other testimony than tradition and antiquity, which, as presumptive proofs, were strong corroborants of faith, but did not suffice of themselves.

1829, Robert Southey, Poetical Works of Robert Southey, page 473