the silky down that invests the seeds of a silk-cotton tree (ka·pok tree)Ceiba pentandra, of the East Indies, Africa, and tropical America: used for stuffing pillows, life jackets, etc., and for acoustical insulation.
When the kapok tree blooms, say the elders, it is time to gather crocodile eggs.
Tour participants look out over the rainforest canopy from viewing platforms constructed in the giant kapok tree.
kapok was also used to stuff seat cushions and mattresses.
Later, the use of kapok was discouraged because the fibers are flammable.
Squeeze kapok life jackets to check that they are pliable and are free of punctures in the inner plastic liner.
British Dictionary definitions for kapok
a silky fibre obtained from the hairs covering the seeds of a tropical bombacaceous tree, Ceiba pentandra (kapok tree or silk-cotton tree): used for stuffing pillows, etc, and for sound insulation Also called silk cotton