kapok
nounDefinition of kapok
1
or kapok tree
: a massive tropical deciduous tree (Ceiba pentandra) of the silk-cotton family that has a trunk with short, sharp prickles, a buttressed base, and porous lightweight wood and that bears large seed pods containing numerous silky fibers
2
: a mass of silky fibers that surrounds the seeds of the kapok tree and are used especially as a filling for mattresses, pillows, life preservers, and sleeping bags and as insulation
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