| alluvium | (noun) clay or silt or gravel carried by rushing streams and deposited where the stream slows down | Synonyms: alluvial deposit, alluvial sediment, alluvion |
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| effluvium | (noun) a foul-smelling outflow or vapor (especially a gaseous waste) | - |
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| flerovium | (noun) a radioactive transuranic element | Synonyms: Fl |
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| mendelevium | (noun) a radioactive transuranic element synthesized by bombarding einsteinium with alpha particles (Md is the current symbol for mendelevium but Mv was formerly the symbol) | Synonyms: atomic number 101, Md, Mv |
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| quadrivium | (noun) (Middle Ages) a higher division of the curriculum in a medieval university involving arithmetic and music and geometry and astronomy | - |
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| synovium | (noun) a thin membrane in synovial (freely moving) joints that lines the joint capsule and secretes synovial fluid | Synonyms: synovial membrane |
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| trivium | (noun) (Middle Ages) an introductory curriculum at a medieval university involving grammar and logic and rhetoric; considered to be a triple way to eloquence | - |
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