| anode | (noun) a positively charged electrode by which electrons leave an electrical device | - |
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| (noun) the negatively charged terminal of a voltaic cell or storage battery that supplies current | - |
| antinode | (noun) (physics) the point of maximum displacement in a periodic system | - |
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| echinoderm | (noun) marine invertebrates with tube feet and five-part radially symmetrical bodies | - |
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| immunodeficiency | (noun) immunological disorder in which some part of the body's immune system is inadequate and resistance to infectious diseases is reduced | - |
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| immunodeficient | (adjective) incapable of developing an immune response following exposure to an antigen | - |
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| internode | (noun) a segment of a stem between two nodes | - |
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| melanoderma | (noun) abnormally dark skin caused by increased deposits of melatonin | - |
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| node | (noun) (computer science) any computer that is hooked up to a computer network | Synonyms: client, guest |
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| (noun) any bulge or swelling of an anatomical structure or part | - |
| (noun) the source of lymph and lymphocytes | Synonyms: lymph gland, lymph node |
| (noun) (astronomy) a point where an orbit crosses a plane | - |
| (noun) (physics) the point of minimum displacement in a periodic system | - |
| (noun) (botany) the small swelling that is the part of a plant stem from which one or more leaves emerge | Synonyms: leaf node |
| (noun) any thickened enlargement | Synonyms: knob, thickening |
| (noun) a connecting point at which several lines come together | - |