caṇḍālakula : [nt.] the lowest caste.

A.P. Buddhadatta Mahathera, Concise Pali-English and English-Pali Dictionary [available as digital version from Metta Net, Sri Lanka]

gdol ba'i rigs

[translation-san] {C} (pukkasa-)caṇḍālakula

[translation-eng] {C} family of outcasts; outcast

Jeffrey Hopkins' Tibetan-Sanskrit-English Dictionary