12-letter words containing s, p, r, o
- ornithoscopy — divination from the observation of birds
- oropharynxes — Plural form of oropharynx.
- orthopaedics — (used with a singular verb) the medical specialty concerned with correction of deformities or functional impairments of the skeletal system, especially the extremities and the spine, and associated structures, as muscles and ligaments.
- orthopaedist — Alternative spelling of orthopedist.
- orthopterans — Plural form of orthopteran.
- orthopterist — someone who studies the Orthoptera
- orthopterous — belonging or pertaining to the Orthoptera, an order of insects, including the cockroaches, mantids, walking sticks, crickets, grasshoppers, and katydids, characterized by leathery forewings, membranous hind wings, and chewing mouthparts.
- orthotropism — Botany. orthotropic tendency or growth.
- orthotropous — Botany. (of an ovule) straight and symmetrical, with the chalaza at the evident base and the micropyle at the opposite extremity.
- oscillograph — a device for recording the wave-forms of changing currents, voltages, or any other quantity that can be translated into electric energy, as sound waves.
- osmoreceptor — A sensory receptor, primarily found in the hypothalamus of most homeothermic organisms, that detects changes in osmotic pressure.
- osteoporosis — a disorder in which the bones become increasingly porous, brittle, and subject to fracture, owing to loss of calcium and other mineral components, sometimes resulting in pain, decreased height, and skeletal deformities: common in older persons, primarily postmenopausal women, but also associated with long-term steroid therapy and certain endocrine disorders.
- osteoporotic — of, relating to, or caused by osteoporosis.
- outcroppings — Plural form of outcropping.
- outspreading — Present participle of outspread.
- outstripping — to outdo; surpass; excel.
- over-precise — definitely or strictly stated, defined, or fixed: precise directions.
- over-promise — a declaration that something will or will not be done, given, etc., by one: unkept political promises.
- overcompress — to compress, squeeze or condense excessively
- overdevelops — Third-person singular simple present indicative form of overdevelop.
- overemphasis — excessive or undue emphasis.
- overexposure — excessive exposure, especially of photographic film or a sensitized plate to light rays.
- overlordship — a person who is lord over another or over other lords: to obey the will of one's sovereign and overlord.
- overoptimism — a disposition or tendency to look on the more favorable side of events or conditions and to expect the most favorable outcome.
- overoptimist — someone who is too optimistic
- overpersuade — to persuade (a person) against his or her inclination or intention: By threats and taunts they had overpersuaded him to steal the car.
- overpressure — pressure in excess of normal atmospheric pressure, as that caused by an explosion's shock wave or created in an accelerating airplane.
- overpurchase — to acquire by the payment of money or its equivalent; buy.
- overripeness — the state of being too ripe
- overseas cap — a soft, brimless military cap
- overshipment — an act or instance of shipping freight or cargo.
- oversimplify — make too simple
- overspending — the act or an instance of spending in excess of one's desires or what one can afford or is allocated
- oyster plant — salsify.
- pachycarpous — having a thick pericarp
- pachydermous — any of the thick-skinned, nonruminant ungulates, as the elephant, hippopotamus, and rhinoceros.
- pacific rose — a large variety of eating apple from New Zealand, with sweet flesh
- palindromist — a word, line, verse, number, sentence, etc., reading the same backward as forward, as Madam, I'm Adam or Poor Dan is in a droop.
- pantisocracy — a community, social group, etc, in which all have rule and everyone is equal
- papoose-root — the blue cohosh. See under cohosh.
- parachronism — a chronological error in which a person, event, etc., is assigned a date later than the actual one.
- paraglossate — having paraglossae
- paragnathous — (of certain vertebrates) having the upper and lower jaws of equal length
- paramorphism — the process by which a paramorph is formed.
- paranthropus — (sometimes initial capital letter) a member of the former genus Paranthropus.
- paraphimosis — inability to retract the penis into the prepuce as a result of narrowing of the prepuce
- parapophysis — the process of a vertebra
- parasitology — the branch of biology dealing with parasites and the effects of parasitism.
- parasol pine — stone pine (def 1).
- parasphenoid — a bone next to the sphenoid bone in the skull of some animals