a.1.(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.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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Kosuda, Hayashida, and Yoshinari have developed a hologram-recording material with high refractive index, flexibility, high sensitivity, low scattering, environmental resistance, durability, and low shrinkage, and sensitive not only to a green laser but also a blue laser: This material consists of a metal oxide containing Si and Zr with an aromatic carboxylic acid such as toluic acid and a photopolymerizable compound.