1. a series of small, rounded projections or notches along an edge or margin
Usage: commonly used in biology and geology
2. a small rounded projection on the margin of a leaf or shell
Usage: botanical and zoological term

Examples

• The leaf's crenulation gave it a delicate, scalloped appearance.
• Under the microscope, the crenulation of the cell membrane was clearly visible.
• The shell displayed fine crenulation along its entire edge.
• Botanists identified the plant species by the distinctive crenulation of its leaves.
• The rock's crenulation pattern suggested it had been shaped by water erosion.
• The crenulation on the fossil's surface helped paleontologists classify the specimen.