RILLE
Source: 567
Rille (rĭl), n. [[G. rille a furrow.]] (Astron.) One of certain narrow, crooked valleys seen, by aid of the telescope, on the surface of the moon.
Source: 567
Rille (rĭl), n. [[G. rille a furrow.]] (Astron.) One of certain narrow, crooked valleys seen, by aid of the telescope, on the surface of the moon.