What does corroborant mean?
A corroborant is a strengthening or restorative agent — most commonly a medicine or tonic believed to impart vigor to a weakened body. The word derives from the Latin corroborare, 'to strengthen', built on robur, meaning oak wood and, figuratively, firmness or power. In earlier centuries, physicians spoke freely of corroborants alongside tonics and stimulants when treating exhaustion, convalescence, or general debility, and the adjective corroborant was occasionally used in the same sense. Today the term has largely fallen out of everyday use, surviving mainly in historical medical literature and dictionaries of older English, while its more famous relative, 'to corroborate' — meaning to confirm or support with evidence — remains in constant use. Encountering corroborant therefore signals either antiquarian reading or deliberate archaism, but it offers a vivid window into an era when medicine described remedies in terms of bracing and fortifying the body's strength rather than targeting specific diseases.
nounA strengthening or restorative agent, especially a medicine or tonic that gives vigor to the body.
- A strengthening or restorative medicine; a tonic that imparts vigor to the body.
"The physician prescribed a mild corroborant to restore the convalescent patient's strength."
"The apothecary mixed a corroborant of herbs and wine to revive her flagging strength."
"In older medical texts, a corroborant was any remedy thought to brace and fortify the system."
The plural is regular and appears mainly in historical medical writing listing various restorative remedies.
"The dispensary stocked several corroborants recommended for patients recovering from fever."
Before 'corroborate' became the lawyer's favorite word for backing up evidence, its Latin root meant something far more physical — an oak-like strength you could swallow as medicine.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of corroborant
Corroborant comes from the Latin corroborare, meaning 'to strengthen', formed from the intensive prefix cor- plus roborare, itself derived from robur, the Latin word for oak that also signified strength and firmness. It entered English in early modern usage, primarily within medical writing, where it named any remedy that restored vigor to the weakened body. The same Latin root produced the verb corroborate and its derivatives, which shifted toward confirming or supporting evidence rather than physically strengthening a person.
Related word forms
How corroborant is actually used
Corroborant is now rare, appearing mainly in historical or antiquarian medical writing. It carries a formal, old-fashioned register and is not part of contemporary clinical vocabulary.
Easily confused with corroborant
Corroboration means confirmation of evidence or testimony, whereas a corroborant is a physical restorative or strengthening remedy.