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|Noun||1.||crenelle - 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.||crenelle - a notch or open space between two merlons in a crenelated battlement|
battlement, crenelation, crenellation - a rampart built around the top of a castle with regular gaps for firing arrows or guns
space - an empty area (usually bounded in some way between things); "the architect left space in front of the building"; "they stopped at an open space in the jungle"; "the space between his teeth"