Ter″mi‐na′tor (?), n. 1. One who, or that which, terminates.
2. (Astron.) The dividing line between the illuminated and the unilluminated part of the moon.
Webster's Dictionary 1913
Ter″mi‐na′tor (?), n. 1. One who, or that which, terminates.
2. (Astron.) The dividing line between the illuminated and the unilluminated part of the moon.