Balsa n. : A raft or float, used principally on the Pacific coast of South America.

Example:
What is the proper way to glue Balsa sheeting over a Balsa model airplane frame?

Taxonomy
Balsa, Ochroma pyramidale, Balsa wood, unranked, free encyclopedia, Balsa trees, 30m, kg/m³, ft³, quality balsa, tree, search, reading, unclear, lacks, precise citations, Painting, Frances.

Defination from the web:
Balsa wood is used to make very light, stiff structures in model bridge tests and for the construction of light wooden aeroplanes, most famously ... In table tennis paddles, a balsa layer is typically sandwiched between two pieces of thin plywood. ...