balsa
Học thuậtThân thiện
Definition
Noun: 1. A type of tree: A fast-growing tropical tree (Ochroma pyramidale) native to the Americas, known for producing extremely lightweight wood. 2. A type of wood: The very light, soft, but relatively strong wood from the balsa tree.
Usage and Examples
- Referring to the tree:
- The balsa is a pioneer species, often one of the first to grow in cleared rainforest areas.
- They planted a balsa on the edge of the property.
- Referring to the wood:
- The model airplane was built from balsa because of its excellent strength-to-weight ratio.
- The life raft's buoyancy came from blocks of balsa wood.
Advanced Usage and Notes
- Technical/Industrial Context: Balsa wood is often described as a "core material" in composite structures, such as in boat hulls and wind turbine blades, where it is sandwiched between layers of fiberglass or carbon fiber.
- Precision in Meaning: While "balsa" almost always refers to the wood of the tree, in specific botanical contexts, it is important to use the full scientific name to avoid confusion with other lightweight woods.
Variants and Related Words
- Balsa wood: The most common compound term, explicitly specifying the material. (e.g., ).
- Ochroma: The scientific genus name for the balsa tree.
Synonyms
- For the wood: Corkwood (a less common name, referring to its lightweight, buoyant properties). Note: This is not botanically accurate for true cork, which comes from the cork oak.
- Lightweight wood (a descriptive phrase, not a direct synonym).
Idioms and Fixed Phrases
There are no common idioms using the word "balsa" in standard English. Its usage is almost exclusively literal, referring to the tree or its wood.
Noun
- forest tree of lowland Central America having a strong very light wood; used for making floats and rafts and in crafts
- strong lightweight wood of the balsa tree used especially for floats