Pronunciation:
[key-pok]

 
Origin:
1735, from Malay kapoq, name of the large tropical tree which produces the fibers.

Definition:
Short, lightweight cotton-like fibers from the seed pod of trees of the family Bombacabeae. A very brittle fiber, it is generally not spun. It is used for stuffing cushions, mattresses, etc., an for life jackets because of its buoyancy and moisture resistance.