n.
1.one of a series of rounded projections (or the notches between them) formed by curves along an edge (as the edge of a leaf or piece of cloth or the margin of a shell or a shriveled red blood cell observed in a hypertonic solution etc.)
2.a notch or open space between two merlons in a crenelated battlement crenel v.
1.supply with battlements
Idiom of the Day
tone (something) down or tone down (something)
to make something less harsh or strong, to moderate something
The union leader was forced to tone down his language after the strike became violent.