Source : Webster's Revised Unabridged Dictionary (1913)

Custodial \Cus*to"di*al\ (k?s-t?"d?-al), a. [Cf. F. custodial,
   fr. L. custodia. See {Custody}.]
   Relating to custody or guardianship.

Source : WordNet®

custodial
     adj : providing protective supervision; watching over or
           safeguarding; "daycare that is educational and not just
           custodial"; "a guardian angel"; "tutelary gods" [syn: {guardian},
            {tutelary}, {tutelar}]