Toluic \To*lu"ic\, a. (Chem.)
Pertaining to, or designating, one of three metameric acids,
{CH3.C6H4.CO2H}, which are related to toluene and analogous
to benzoic acids. They are white crystalline substances, and
are called respectively {orthotoluic} acid, {metatoluic}
acid, and {paratoluic} acid.
[1913 Webster]