10-letter words that end in um
- meitnerium — a superheavy, synthetic, radioactive element. Symbol: Mt; atomic number: 109.
- memorandum — a short note designating something to be remembered, especially something to be done or acted upon in the future; reminder.
- mesorectum — the mesentery of the rectum.
- mesovarium — the mesentery of the ovary.
- metapontum — an ancient Greek city in SE Italy, on the Gulf of Taranto: home of Pythagoras in exile.
- millennium — a period of 1000 years.
- minivacuum — a small, handheld vacuum cleaner, as for vacuuming upholstered furniture or car seats, or other relatively small areas.
- miracidium — the larva that hatches from the egg of a trematode worm or fluke.
- molybdenum — a silver-white metallic element, used as an alloy with iron in making hard, high-speed cutting tools. Symbol: Mo; atomic weight: 95.94; atomic number: 42; specific gravity: 10.2.
- monopodium — a single main axis that continues to extend at the apex in the original line of growth, giving off lateral branches beneath in acropetal succession.
- monosodium — containing one atom of sodium.
- moratorium — a suspension of activity: a moratorium on the testing of nuclear weapons.
- myocardium — the muscular substance of the heart.
- myometrium — The smooth muscle tissue of the uterus.
- nasturtium — any plant of the genus Tropaeolum, cultivated for its showy, usually orange, red, or yellow flowers or for its fruit, which is pickled and used like capers.
- natal plum — a southern African bushy shrub, Carissa grandiflora, of the dogbane family, having forked spines, white flowers, and egg-shaped, red berries.
- natatorium — a swimming pool, especially one that is indoors.
- neopallium — neocortex.
- nephridium — the excretory organ of many invertebrates, consisting of a tubule with one end opening into the body cavity and the other opening into a pore at the body surface.
- neutronium — (physics) the supposed material composed entirely of neutrons that composes a neutron star.
- neverendum — A series of referendums on the same issue held in an attempt to achieve an unpopular result.
- nidamentum — an egg capsule, the material used to construct an egg receptacle or nest
- notopodium — (zoology) The dorsal lobe or branch of a parapodium.
- oceanarium — a large saltwater aquarium for the display and observation of fish and other marine life.
- ommatidium — one of the radial elements composing a compound eye.
- on the bum — a person who avoids work and sponges on others; loafer; idler.
- opprobrium — the disgrace or the reproach incurred by conduct considered outrageously shameful; infamy.
- orichalcum — a brass rich in zinc, prepared by the ancients.
- osmeterium — a glandular process on the first thoracic segment of many caterpillars that emits a noxious odor to ward off predators.
- osmiridium — iridosmine.
- oxycalcium — pertaining to or produced by oxygen and calcium.
- panaritium — a whitlow
- pancratium — (in ancient Greece) an athletic contest combining wrestling and boxing.
- panjandrum — a self-important or pretentious official.
- paramecium — any ciliated freshwater protozoan of the genus Paramecium, having an oval body and a long, deep oral groove.
- parapodium — one of the unjointed rudimentary limbs or processes of locomotion of many worms, as annelids.
- per centum — percent (def 1).
- peridinium — a member of the Peridinium genus of marine- or freshwater-dwelling dinoflagellate organisms characterized by armoured plates
- perigonium — the envelope of modified leaves surrounding the antheridia in mosses.
- perimysium — the connective tissue surrounding bundles of skeletal muscle fibers.
- periosteum — the normal investment of bone, consisting of a dense, fibrous outer layer, to which muscles attach, and a more delicate, inner layer capable of forming bone.
- peritoneum — the serous membrane lining the abdominal cavity and investing its viscera.
- petrolatum — a translucent gelatinous substance obtained from petroleum; used as a lubricant and in medicine as an ointment base and protective dressing
- phyllodium — phyllode.
- plasmodium — Biology. an ameboid, multinucleate mass or sheet of cytoplasm characteristic of some stages of organisms, as of myxomycetes or slime molds.
- polemonium — a member of the genus Polemonium
- postbellum — occurring after a war, especially after the American Civil War: postbellum reforms.
- postpartum — of or noting the period of time following childbirth; after delivery.
- postulatum — a postulate
- praeludium — a prelude, now predominantly in a musical context