Webster's 1828 Dictionary
ROBORANT
a.[L. roborans, roboro.] Strengthening.
ROBORANT
n.A medicine that strengthens; but corroborant is generally used.
Webster's 1913 Dictionary
ROBORANT
Rob "o *rant, a. Etym: [L. roborans, p. pr. See Roborate. ]
Defn: Strengthening. -- n. (Med. )
Defn: A strengthening medicine; a tonic.
New American Oxford Dictionary
roborant
rob o rant |ˈräbərənt, ˈrō -ˈrɑbərənt |Medicine ▶adjective (chiefly of a medicine ) having a strengthening effect. ▶noun a roborant medicine. ORIGIN mid 17th cent.: from Latin roborant- ‘strengthening, ’ from the verb roborare, from robur, robor- ‘strength. ’
Oxford Dictionary
roborant
rob o rant |ˈräbərənt, ˈrō -ˈrɑbərənt |Medicine ▶adjective (chiefly of a medicine ) having a strengthening effect. ▶noun a roborant medicine. ORIGIN mid 17th cent.: from Latin roborant- ‘strengthening, ’ from the verb roborare, from robur, robor- ‘strength. ’