lines of weakness

Definition

Specific planes or locations within an insect's exoskeleton where the cuticle is thinner or has structural differences, making these areas more susceptible to breakage or damage.

Etymology

Derived from the general English usage of 'line', referring to a narrow mark or band, and 'weakness', indicating a lack of strength. The term has been adapted to entomological contexts to describe structurally weaker areas.

Example

During molting, insects often use the lines of weakness to split their old exoskeleton and emerge more easily.

Synonyms

• fracture lines
• weak zones

Related Terms

• exoskeleton
• cuticle
• molting

Usage Notes

Understanding the locations of lines of weakness is important for studying insect growth and their vulnerability to physical damage.