| 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 | - |
| anodyne | (noun) a medicine used to relieve pain | Synonyms: analgesic, pain pill, painkiller |
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| antinode | (noun) (physics) the point of maximum displacement in a periodic system | - |
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| clinodactyly | (noun) a congenital defect in which one or more toes or fingers are abnormally positioned | - |
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| conodont | (noun) small (2 inches long) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone; late Cambrian to late Triassic; possible predecessor of the cyclostomes | - |
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| (noun) the tiny fossil cone-shaped tooth of a primitive vertebrate of order Conodonta | - |
| cynodont | (noun) small carnivorous reptiles | - |
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| cyprinodont | (noun) any member of the family Cyprinodontidae | - |
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| dicynodont | (noun) a kind of therapsid | - |
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| echinoderm | (noun) marine invertebrates with tube feet and five-part radially symmetrical bodies | - |
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| epanodos | (noun) repetition of a group of words in reverse order | - |
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| (noun) recapitulation of the main ideas of a speech (especially in reverse order) | - |
| hymnody | (noun) the act of singing psalms or hymns | Synonyms: psalmody |
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| iguanodon | (noun) massive herbivorous bipedal dinosaur with a long heavy tail; common in Europe and northern Africa; early Cretaceous period | - |
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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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| 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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| monody | (noun) music consisting of a single vocal part (usually with accompaniment) | Synonyms: monophonic music, monophony |
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| nod | (noun) the act of nodding the head | - |
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| (noun) a sign of assent or salutation or command | - |
| noddle | (noun) an informal British expression for head or mind | - |
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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 | - |
| nodule | (noun) a small node | - |
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| (noun) (mineralogy) a small rounded lump of mineral substance (usually harder than the surrounding rock or sediment) | - |
| (noun) small rounded wartlike protuberance on a plant | Synonyms: tubercle |
| norethynodrel | (noun) a progesterone derivative used in oral contraceptives and in the control of menstruation and the treatment of abnormal uterine bleeding | - |
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| pycnodysostosis | (noun) a form of dwarfism accompanied by fragile bones and bad teeth | - |
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| synod | (noun) a council convened to discuss ecclesiastical business | - |
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| threnody | (noun) a song or hymn of mourning composed or performed as a memorial to a dead person | Synonyms: coronach, dirge, lament, requiem |
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