| tube | (noun) conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases | Synonyms: tubing |
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| (noun) an electric railway operating below the surface of the ground (usually in a city) | Synonyms: metro, subway, subway system, underground |
| (noun) electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope | Synonyms: electron tube, thermionic tube, thermionic vacuum tube, thermionic valve, vacuum tube |
| (noun) (anatomy) any hollow cylindrical body structure | Synonyms: tube-shaped structure |
| (noun) a hollow cylindrical shape | Synonyms: pipe |
| tubeless | (noun) pneumatic tire not needing an inner tube to be airtight | Synonyms: tubeless tire |
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| tuber | (noun) a fleshy underground stem or root serving for reproductive and food storage | - |
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| tubercle | (noun) a protuberance on a bone especially for attachment of a muscle or ligament | Synonyms: eminence, tuberosity |
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| (noun) small rounded wartlike protuberance on a plant | Synonyms: nodule |
| (noun) a swelling that is the characteristic lesion of tuberculosis | - |
| tubercular | (noun) a person with pulmonary tuberculosis | Synonyms: consumptive, lunger |
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| tuberculin | (noun) a sterile liquid containing a purified protein derivative of the tuberculosis bacterium; used in the diagnosis of tuberculosis | - |
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| tuberculosis | (noun) infection transmitted by inhalation or ingestion of tubercle bacilli and manifested in fever and small lesions (usually in the lungs but in various other parts of the body in acute stages) | Synonyms: T.B., TB |
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| tuberose | (noun) a tuberous Mexican herb having grasslike leaves and cultivated for its spikes of highly fragrant lily-like waxy white flowers | Synonyms: Polianthes tuberosa |
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| tuberosity | (noun) a protuberance on a bone especially for attachment of a muscle or ligament | Synonyms: eminence, tubercle |
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