I. ˈril noun
( -s )
Etymology: Dutch ril or Low German rille furrow, channel made by a small stream, rill; akin to Frisian ril narrow passage, narrow path, Old English rīth, rīthe brook, stream, Old Saxon rīth gushing brook, Middle Low German rīde brook, and probably to Old English rīsan to rise — more at rise
1.
a. : a very small brook : rivulet , streamlet
b. : a small depression or channel eroded by a rill
2. : a transient runnel in which the water of a wave returns to the sea or a lake after breaking on a beach
II. intransitive verb
( -ed/-ing/-s )
: to run in a small stream : flow like a rill
III. adjective
: groove
IV. ˈril noun
or rille “, ˈrilə
( -s )
Etymology: German rille, literally, furrow, channel made by a small stream, from Low German
: one of several long, narrow telescopic valleys on the surface of the moon