An open room or notch between two merlons in a battlement or crenelated wall.
the area between merlons in a crenelated battlement.
The peak near the top of a helmet.
just like crenelle.
In botany, a tooth of a crenate leaf; a crenature.
one of a series of rounded projections (and/or notches among them) formed by curves along an advantage (due to the fact side of a leaf or little bit of cloth and/or margin of a shell or a shriveled purple bloodstream cell noticed in a hypertonic solution etc.)
a notch or open room between two merlons in a crenelated battlement