intine
Noun
Meaning
A transparent, extensible membrane of extreme tenuity, which forms the innermost coating of grains of pollen.
Source: Webster's dictionaryAnagrams
Examples
The vegetative and generative cells are surrounded by a thin delicate wall of unaltered cellulose called the endospore or intine, and a tough resistant outer cuticularized wall composed largely of sporopollenin called the exospore or exine.
The callose wall is broken down by an enzyme called callase and the freed pollen grains grow in size and develop their characteristic shape and form a resistant outer wall called the exine and an inner wall called the intine.
These two layers are the tectum and the foot layer, which is just above the intine.