English: reader
Welsh: darllenydd
Subject: Cyffredinol
English definition: A person who, for the purposes of research or study and with the permission of the Deposit Library is on library premises controlled by it.
Welsh definition: Person sydd, at ddibenion ymchwil neu astudiaeth a chyda caniatâd y llyfrgell adnau, yn adeiladau'r llyfrgell a reolir ganddi.