Definition, Meaning & Synonyms

exine

noun

ˈɛkˌsiːn

Definition

The outer layer of the wall of a pollen grain or spore.

Examples

The exine of the pollen grain is often used to identify plant species.
Researchers study the exine’s structure to understand how pollen survives harsh conditions.
Different types of plants produce pollen with unique exine characteristics.

Meaning

Exine is the tough outer protective layer of pollen grains and spores, which helps them to survive in various environmental conditions until they reach their intended destination for fertilization or reproduction.