1. A series of small, rounded projections or indentations along an edge or margin, resembling the teeth of a saw.
Usage: Plural form of crenulation.; Common in biology, geology, and architecture.
2. In fortification, a series of open sections in a battlement wall, alternating with solid sections (merlons).
Usage: Architectural/historical term.; Also called crenels.

Examples

• The leaf margins displayed fine crenulations that helped identify the plant species.
• The castle's crenulations allowed archers to fire arrows while remaining protected.
• Under the microscope, the cell membrane showed delicate crenulations.
• Medieval fortifications featured crenulations along the top of defensive walls.
• The rock formation's crenulations were carved by centuries of water erosion.
• The butterfly's wing edges had intricate crenulations that caught the light.