cf. rho 306, rho 311, and esp. rho 308.
[1] Similarly glossed in other lexica, in reference to Sophocles, Oedipus at Colonus 858: there the headword, a neuter noun, is applied to Oedipus by Creon [Author, Myth] (web address 1).
[2] This secondary headword is attested only here in this form; LSJ registers it as r(upth/rion (presumably after Bernhardy). For the glossing, cf. Hesychius s.v. r(u/toras: tou\s qallou\s tou\s kaqarthri/ous.