corroborant

adj

1. (archaic)strengthening; supporting; corroborating

   “a tonic has a corroborant effect”

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

noun

1. (archaic)Anything that gives strength or support; a tonic.

   “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.”

   “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.”

2. (archaic)Something that corroborates.

   “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.”