- any of several tropical American trees (genus Ochroma) of the bombax family that yield an extremely light and buoyant wood used for rafts, model airplanes, etc.
- the wood
- a raft, esp. one made up of a frame resting on cylindrical floats
See balsa in American Heritage Dictionary 4
a. A tropical American tree (Ochroma pyramidale) having wood that is soft, very light in weight, and that is used as a substitute for cork in insulation, floats, and crafts such as model airplanes.
b. The wood of this tree. Also called corkwood.
- A raft consisting of a frame fastened to buoyant cylinders of wood or metal.
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