An Etymological Dictionary of Astronomy and Astrophysics

1a) A book in which records of acts, events, names, etc., are kept; a list or → record of such acts, events, etc.

1b) An entry in such a book, record, or list.

1c) → Registration or → registry (Dictionary.com).

1d) In computer science, → registry.

2a) To enter or cause to be entered formally in a register.

2b) To enroll (a student, voter, etc.) in a school or course of study, on the voting rolls, etc. (Dictionary.com).

Etymology (EN): M.E. registre, from M.Fr., from O.Fr. registre and directly from M.L. registrum, alteration of L.L. regesta “list, matters recorded,” noun use of L. regesta, from regestus, p.p. of regerere “to record; retort,” literally “to carry back, bring back” from → re- “back” + gerere “carry, bear.”

Etymology (PE): Barnus, from bar- “on, upon, up,” → on-, + nus “to write;” cf. Kurd. (Sor.) nus, nusen “to write;” Lori nisane “to write;” variants of nevis-, neveštan, → write.