单词 | canal |
释义 | canal n.   1. an artificial waterway for inland navigation or irrigation.   2. any of various tubular ducts in a plant or animal, for carrying food, liquid, or air.   3. Astron. any of a network of apparent linear markings on the planet Mars, which are observed from earth but not at close range. Phrases and idioms canal boat a long narrow boat for use on canals. canal ray a beam of positive ions moving through a bored hole in the cathode of a high-vacuum tube. Etymology: ME f. OF (earlier chanel) f. L canalis or It. canale |
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