9-letter words that end in um
- moscovium — a highly radioactive element, of which only a few atoms have ever been produced. Symbol: Mc; atomic no: 115; atomic wt: 289
- muskingum — a river in E Ohio, flowing S and SE to the Ohio River. 111 miles (179 km) long.
- mysterium — (chemistry, alchemy, now historical) Any of various unknown elements thought to make up existing forms of matter, or a substance seen as an elemental or pure form of something else.
- neodymium — a rare-earth, metallic, trivalent element occurring with cerium and other rare-earth metals, and having rose-colored to violet-colored salts. Symbol: Nd; atomic weight: 144.24; atomic number: 60; specific gravity: 6.9 at 20°C.
- neptunium — a transuranic element produced in nuclear reactors by the neutron bombardment of U-238: decays rapidly to plutonium and then to U-235. Symbol: Np; atomic number: 93.
- new sarum — a city in S England, in SE Wiltshire: nearby Old Sarum was the site of an Early Iron Age hill fort; its cathedral (1220–58) has the highest spire in England. Pop: 43 355 (2001)
- nitronium — (inorganic chemistry) The univalent cation NO2+ derived from nitrogen dioxide.
- no-see-um — punkie.
- novaesium — an industrial city in W Germany, in North Rhine-Westphalia west of Düsseldorf: founded as a Roman fortress in the 1st century ad. Pop: 152 050 (2003 est)
- nymphaeum — a room or area having a fountain, statues, flowers, etc.
- oenogarum — Garum diluted with wine.
- onopordum — (botany) Any of the genus Onopordum of asteraceous thistles.
- operculum — Botany, Zoology. a part or organ serving as a lid or cover, as a covering flap on a seed vessel.
- opusculum — opuscule.
- osmoticum — (biology) Any substance that acts to supplement osmotic pressure in a plant or a culture of plant cells.
- ossiculum — (anatomy) An ossicle.
- ossuarium — ossuary.
- otoconium — (anatomy) An otolith or statolith.
- palladium — a rare metallic element of the platinum group, silver-white, ductile and malleable, harder and fusing more readily than platinum: used chiefly as a catalyst and in dental and other alloys. Symbol: Pd; atomic weight: 106.4; atomic number: 46; specific gravity: 12 at 20°C.
- paramylum — a polysaccharide occurring as a reserve carbohydrate in the cytoplasm of Euglena
- pastorium — a Baptist parsonage.
- per annum — by the year; yearly.
- petroleum — oil used for fuel
- 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.
- pollinium — an agglutinated mass or body of pollen grains, characteristic of plants of the orchid and milkweed families.
- polygonum — any polygonaceous plant of the genus Polygonum, having stems with knotlike joints and spikes of small white, green, or pink flowers
- pomoerium — the space around a town within the city walls
- pond scum — any free-floating freshwater alga that forms a green scum on water.
- potassium — a silvery-white metallic element that oxidizes rapidly in the air and whose compounds are used as fertilizer and in special hard glasses. Symbol: K; atomic weight: 39.102; atomic number: 19; specific gravity: 0.86 at 20°C.
- practicum — (in a college or university) the part of a course consisting of practical work in a particular field.
- prescutum — the anterior dorsal sclerite of a thoracic segment of an insect.
- presidium — (in the Soviet Union and other Communist countries) an administrative committee, usually permanent and governmental, acting when its parent body is in recess but exercising full powers: the presidium of the Supreme Soviet.
- prytaneum — a public building in ancient Greece, containing the symbolic hearth of the community and commonly resembling a private dwelling in plan, used as a community meeting place and as a lodging for guests of the community.
- pterygium — an abnormal triangular mass of thickened conjunctiva extending over the cornea and interfering with vision.
- 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
- pycnidium — (in certain ascomycetes and fungi imperfecti) a globose or flask-shaped fruiting body bearing conidia on conidiophores.
- pyrethrum — any of several chrysanthemums, as Chrysanthemum coccineum, having finely divided leaves and showy red, pink, lilac, or white flowers, cultivated as an ornamental.
- qizil qum — Kyzyl Kum.
- quaesitum — something that is sought; the solution to a problem
- quercetum — a group of oak trees
- reddendum — a legal clause specifying what shall be given in return for the granting of a lease
- reptilium — a building for the public exhibition of reptiles.
- responsum — the reply of a noted rabbi or Jewish scholar as rendered in the Responsa.
- reticulum — any fine network, esp one in the body composed of cells, fibres, etc
- rhipidium — a fan-shaped arrangement of flowers on a plant
- rhizobium — any of several rod-shaped bacteria of the genus Rhizobium, found as symbiotic nitrogen fixers in nodules on the roots of the bean, clover, etc.
- rostellum — Biology. any small, beaklike process.
- ruthenium — a steel-gray, rare metallic element, belonging to the platinum group of metals. Symbol: Ru; atomic weight: 101.07; atomic number: 44; specific gravity: 12.2 at 20°C.
- saccharum — a brewing sugar derived from cane sugar
- sacrarium — Roman Catholic Church. a piscina.