Definition

1. Noun:
   • A rounded, scalloped, or notched projection on an edge: "crenation" refers specifically to one of a series of small, rounded, tooth-like projections or the notches between them, forming a scalloped outline along a margin or edge.
   • A biological and histological term: In biology, it commonly describes the scalloped or notched appearance of the edge of a structure, such as a plant leaf, a piece of cloth, a seashell, or a red blood cell that has shriveled in a hypertonic solution.

Usage Examples

• Noun:
  • The leaf's margin had a distinct crenation, giving it a beautifully scalloped appearance.
  • Under the microscope, the hypertonic solution caused the red blood cells to exhibit crenation, losing their smooth, round shape.
  • The crenation along the hem of the antique cloth was a sign of delicate craftsmanship.

Advanced Usage

• "Crenation of red blood cells": A specific process in physiology where cells shrink and develop a spiky, scalloped border due to water loss in a hypertonic environment.
  • The experiment demonstrated the crenation of erythrocytes when placed in a saline solution with high salt concentration.

Variants and Related Words

• Crenate (adj): Having a margin with rounded scallops or teeth.
  • The botanist identified the plant by its crenate leaves.
• Crenulated (adj): Finely or minutely crenate.
  • The crenulated edge of the fossil was remarkably well-preserved.

Synonyms

• Scalloping: Forming a series of curved projections.
• Indentation: A notch or recess in a surface or edge. (Note: "Indentation" is more general, while "crenation" implies a specific, rounded, tooth-like series.)

Related Terms (Not Phrasal Verbs)

• Echinocyte: The technical term for a crenated red blood cell.
• Hypertonicity: The condition of a solution having a higher solute concentration, which can cause crenation in cells.

Noun

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.)