balsa

balsa
[ˈbɔːlsə, ˈbɒlsə]
noun
[mass noun]
  1. (亦作 balsa wood)very lightweight timber used chiefly for making models and rafts
    (主要用于制造模型和木筏的)轻木木材
  2. the fast-growing tropical American tree from which this timber is obtained
    轻木
  3. Ochroma lagopus or pyramidale, family Bombacaceae
    轻木。拉丁名Ochroma lagopus(或Ochroma pyramidale),木棉科
语源
  1. early 17th cent. (denoting a kind of South American raft or fishing boat): from Spanish, raft'
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