Chem. [f. L. (ūva) urs-i (see UVA) + -ONE.] A crystalline principle obtained esp. from the leaves of the bearberry.
1866. Watts, trans. Gmelin’s Handbk. Chem., XVII. 361. Ursone burns with a yellow smoky flame.
1885. Buck’s Handbk. Med. Sci., I. 482/1. Ericolin … is an amorphous, yellowish glucoside, yielding with diluted acids sugar, and an essential oil—ursone.
1892. C. E. A. Semple, Mat. Med., 318. Two crystallisable principles, Ursone (C20H32O2) and Arbutin (C12H16O7).
