9-letter words containing oniu
- carbonium — a transient, positively charged organic ion, as H3C+, R3+, that has one less electron than the corresponding free radical
- diazonium — of, consisting of, or containing the group, Ar-N:N-, where Ar is an aryl group
- euphonium — A valved brass musical instrument resembling a small tuba of tenor pitch, played mainly in military and brass bands.
- harmonium — an organlike keyboard instrument with small metal reeds and a pair of bellows operated by the player's feet.
- hydronium — (inorganic chemistry) the hydrated hydrogen ion, H3O+.
- nitronium — (inorganic chemistry) The univalent cation NO2+ derived from nitrogen dioxide.
- otoconium — (anatomy) An otolith or statolith.
- petronius — Gaius (ˈɡaɪəs), known as Petronius Arbiter. died 66 ad, Roman satirist, supposed author of the Satyricon, a picaresque account of the licentiousness of contemporary society
- plutonium — a transuranic element with a fissile isotope of mass number 239 (plutonium 239) that can be produced from non-fissile uranium 238, as in a breeder reactor. Symbol: Pu; atomic number: 94.
- purdonium — a type of coal scuttle having a slanted cover that is raised to open it, and an inner removable metal container for the coal
- suetonius — (Gaius Suetonius Tranquillus) a.d. 75–150, Roman historian.
- sulfonium — the positively charged group H 3 S + , its salts, or their substitute products.
- zirconium — a metallic element found combined in zircon, baddeleyite, etc., resembling titanium chemically: used in steel metallurgy, as a scavenger, as a refractory, and as an opacifier in vitreous enamels. Symbol: Zr; atomic weight: 91.22; atomic number: 40; specific gravity: 6.49 at 20°C.
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