Custos

||Cus"tos (kŭs"tŏs), n.; pl. Custodes (kŭs*tō"dēz). [L.] A keeper; a custodian; a superintendent. [Obs.]

Custos rotulorum (rŏt`?*lō"rŭm) [LL., keeper of the rolls] (Eng. Law), the principal justice of the peace in a county, who is also keeper of the rolls and records of the sessions of the peace.