TUBE

noun Etymology: French, from Latin tubus; akin to Latin tuba trumpet Date: 1651 any of various usually cylindrical structures or devices: as, a hollow elongated cylinder, a soft tubular container whose contents (as toothpaste) can be removed by squeezing, c. tunnel , subway b, the basically cylindrical section between the mouthpiece and bell that is the fundamental part of a wind instrument, 2. a slender channel (as a fallopian ~ or a pollen ~) within a plant or animal body ; duct , the narrow basal portion of a corolla with united petals or a calyx with united sepals, inner ~ , 4. electron ~ , cathode-ray ~ , television , an article of clothing shaped like a ~ , ~d adjective ~like adjective