This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Of or relating to the work of guarding or maintaining: the custodial duties of a security guard.

adj. Having custody, especially of a child: "children whose custodial parent has remarried” ( American Demographics).

adj. Of or relating to child custody: custodial households.

adj. Marked by care and supervision rather than efforts to cure: custodial treatment of terminal patients.

adj. Providing protection, care, supervision or guarding

adj. Of, pertaining to or providing custody, especially of a child

adj. Providing punishment by incarceration

adj. Relating to custody or guardianship.

Relating to or of the nature of custody or guardianship.

n. Same as custodia. C. Reade.

adj. providing protective supervision; watching over or safeguarding

"BNY Mellon provided the pension funds with what are known as "custodial" and back-office financial services."

protective   

custodian    custody   

custodial parent    custodial care    custodial symmetry    custodial sentence    custodial rape    custodial interrogation    custodial area    custodial account   

pseudopodial   

janitorial    ashen-faced    abigger    adn.com    18-month    unionize    coordinating    boats'    not-so-funny    run-on