Cyn`ar*rho"di*um (s?n`?r-r?"d?-?m), n. [NL., from Gr. &?;&?;&?;&?;&?; dog-rose; &?;&?;&?;&?;, &?;&?;&?;, dog + &?;&?;&?; rose.] (Bot.) A fruit like that of the rose, consisting of a cup formed of the calyx tube and receptacle, and containing achenes.