Definition of custodiam in US English:

custodiam

noun

Law
historical
  • Especially in Ireland: a grant, made by the Exchequer, of the custody of land or other property belonging to the British Crown to a person for a certain period of time, giving the lessee the right to collect rents from the land or property granted. In later use sometimes more fully "custodiam lease", "custodiam grant".

Origin

Early 17th century; earliest use found in Fynes Moryson (?1566–1630), traveller and writer. From classical Latin custōdiam, accusative of custōdia custody, in the wording of the grant; compare post-classical Latin Sciatis quod commisimus…custodiam omnium terrarum et tenementorum ‘Know ye that we have granted…the custody of all lands and tenements.’ (or similar), in the text of a grant issued by the Chancery.