InositeIn"o*site\, n. [Gr. ?, ?, strength, muscle.] (Physiol. Chem.) A white crystalline substance with a sweet taste, found in certain animal tissues and fluids, particularly in the muscles of the heart and lungs, also in some plants, as in unripe pease, beans, potato sprouts, etc. Called also phaseomannite. Note: Chemically,it has the composition represented by the formula, C6H12O6+H2O, and was formerly regarded as a carbohydrate, isomeric with dextrose, but is now known to be an aromatic compound (a hexacid phenol derivative of benzene).