What is the meaning of Silk-cotton_tree?

Any of several large tropical trees:

1. Bombax ceiba, native to much of tropical and temperate Asia and Australasia.

   Bombax ceiba, native to much of tropical and temperate Asia and Australasia.

   Ceiba pentandra, native to the American tropics and west Africa.

   Cochlospermum religiosum, native to the Asian tropics.

   Source: wiktionary.org