an artificial waterway constructed to allow the passage of boats or ships inland or to convey water for irrigation 运河,灌溉水渠 ■a tubular duct in a plant or animal, serving to convey or contain food, liquid, or air (植物或动物体内用来传送或容纳食物、液体或空气的)管,道 the ear canal. 耳道。 ■(Astronomy)any of a number of linear markings formerly reported as seen by telescope on the planet Mars (天文)火星运河
语源
late Middle English: from Old French, alteration of chanel 'channel', from Latin canalis 'pipe, groove, channel', from canna 'cane'