8-letter words that end in um
- oncidium — any of numerous tropical American orchids of the genus Oncidium, having clusters of flowers showing great variety in size, form, and color.
- onychium — a small fern plant of Old World tropics and subtropics
- oogonium — one of the undifferentiated germ cells giving rise to oocytes.
- opsonium — any food used as a relish, such as chutney
- origanum — An aromatic plant of a genus that includes marjoram and oregano.
- palatium — a palace, especially the palace of an ancient Roman emperor.
- paspalum — any of various grasses of the genus Paspalum of Australia and New Zealand having wide leaves
- patagium — a wing membrane, as of a bat.
- peculium — property that a father or master allowed his child or slave to hold as his own
- pendulum — a body so suspended from a fixed point as to move to and fro by the action of gravity and acquired momentum.
- pergamum — an ancient Greek kingdom on the coast of Asia Minor: later a Roman province.
- peridium — the outer enveloping coat of the fruit body in many fungi.
- perineum — the area in front of the anus extending to the fourchette of the vulva in the female and to the scrotum in the male.
- philtrum — Anatomy. the vertical groove on the surface of the upper lip, below the septum of the nose.
- phormium — any plant of the New Zealand bulbous genus Phormium, with leathery evergreen leaves and red or yellow flowers in panicles
- placitum — a plea made in court on behalf of a person or group
- platinum — Chemistry. a heavy, grayish-white, highly malleable and ductile metallic element, resistant to most chemicals, practically unoxidizable except in the presence of bases, and fusible only at extremely high temperatures: used for making chemical and scientific apparatus, as a catalyst in the oxidation of ammonia to nitric acid, and in jewelry. Symbol: Pt; atomic weight: 195.09; atomic number: 78; specific gravity: 21.5 at 20°C.
- plectrum — a small piece of plastic, metal, ivory, etc., for plucking the strings of a guitar, lyre, mandolin, etc.
- podetium — (in certain lichens) a stalk bearing an apothecium.
- polonium — a radioactive element discovered by Pierre and Marie Curie in 1898; Symbol: Po; atomic number: 84; atomic weight: about 210.
- posticum — epinaos.
- pronotum — the dorsal sclerite of the prothorax of an insect.
- proprium — a nonessential property common to all the members of a class; attribute.
- psyllium — fleawort.
- pudendum — the external genital organs, especially those of the female; vulva.
- pulpitum — (in many cathedrals and large churches) a stone screen which divides the nave and the choir, often supporting a gallery or loft
- puparium — a hard barrel-shaped case enclosing the pupae of the housefly and other dipterous insects
- pygidium — any of various structures or regions at the caudal end of the body in certain invertebrates.
- pyxidium — a seed vessel that opens transversely, the top part acting as a lid, as in the purslane.
- ramentum — a scraping, shaving, or particle.
- ranarium — a place for keeping or rearing frogs
- red drum — a large, edible drum, Sciaenops ocellatus, living in waters off the Atlantic coast of the U.S.
- refugium — an area where special environmental circumstances have enabled a species or a community of species to survive after extinction in surrounding areas.
- residuum — the residue, remainder, or rest of something.
- rosarium — a rose garden.
- rubidium — a silver-white, metallic, active element resembling potassium, used in photoelectric cells and radio vacuum tubes. Symbol: Rb; atomic weight: 85.47; atomic number: 37; specific gravity: 1.53 at 20°C.
- sacellum — a small chapel, as a monument within a church.
- saeculum — an age in astronomy
- samarium — a rare-earth metallic element discovered in samarskite. Symbol: Sm; atomic weight: 150.35; atomic number: 62; specific gravity: 7.49.
- scalprum — a large scalpel
- scandium — a rare, trivalent, metallic element obtained from thortveitite. Symbol: Sc; atomic weight: 44.956; atomic number: 21; specific gravity: 3.0.
- schellum — a person or an animal that is a rascal or villain
- scholium — Often, scholia. an explanatory note or comment. an ancient annotation upon a passage in a Greek or Latin text.
- scrinium — a cylindrical container used in ancient Rome to hold papyrus rolls.
- scybalum — hard faeces in the intestine
- secundum — according to
- selenium — a nonmetallic element chemically resembling sulfur and tellurium, occurring in several allotropic forms, as crystalline and amorphous, and having an electrical resistance that varies under the influence of light. Symbol: Se; atomic weight: 78.96; atomic number: 34; specific gravity: (gray) 4.80 at 25°C, (red) 4.50 at 25°C.
- serapeum — a place, as a burial site, building, or group of buildings, dedicated to Serapis.
- silicium — silicon.
- silphium — an American flowering wild plant of the family Asteraceae