balsa
From Longman Dictionary of Contemporary EnglishRelated topics: Plantsbalsabal‧sa /ˈbɔːlsə $ ˈbɒːl-/ noun [countable, uncountable] HBPa tropical American tree or the wood from this tree, which is very lightExamples from the Corpusbalsa• The lighter woods, such as balsa, can be crushed with the finger.• Whole sections of the City were trampled flat, buildings going down like balsa wood.• The boy sat on the floor beside her, carving a piece of balsa wood.Origin balsa (1600-1700) Spanish