13-letter words containing c, h, o, s, a
- novocherkassk — a city in the SW Russian Federation in Europe, NE of Rostov.
- nymphaeaceous — belonging to the Nymphaeaceae, the water lily family of plants.
- nymphomaniacs — Plural form of nymphomaniac.
- ocean sunfish — a brown and gray mola, Mola mola, inhabiting tropical and temperate seas, having the posterior half of the body sharply truncated behind the elongated dorsal and anal fins.
- octagon house — a type of American house, c. 1850, having an octagonal perimeter to reduce exterior wall area.
- onychophagist — the practice of biting one's nails, especially when done habitually and as a symptom of emotional disturbance.
- onychophorans — Plural form of onychophoran.
- open sandwich — a sandwich served on only one slice of bread, without a covering slice.
- opisthobranch — any gastropod mollusk of the order Opisthobranchia, as the sea slugs, sea butterflies, and sea hares, characterized by a vestigial or absent mantle and shell and two pairs of tentacles.
- opthalmoscope — Misspelling of ophthalmoscope.
- optic chiasma — a site at the base of the forebrain where the inner half of the fibers of the left and right optic nerves cross to the opposite side of the brain.
- orchard grass — a weedy grass, Dactylis glomerata, often grown for pastures.
- orchesography — a written study of dancing
- orchestra pit — musicians' seating in front of stage
- orchestra-pit — a group of performers on various musical instruments, including especially stringed instruments of the viol class, clarinets and flutes, cornets and trombones, drums, and cymbals, for playing music, as symphonies, operas, popular music, or other compositions.
- orchestralist — a person who writes or arranges orchestral music
- orchestrating — Present participle of orchestrate.
- orchestration — (uncountable) the arrangement of music for performance by an orchestra.
- orchestrators — Plural form of orchestrator.
- ornithischian — any herbivorous dinosaur of the order Ornithischia, having a pelvis resembling that of a bird. Compare saurischian.
- orthosilicate — a silicate mineral
- oscillographs — Plural form of oscillograph.
- oscillography — 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.
- overachievers — Plural form of overachiever.
- oystercatcher — any of several long-billed wading birds of the genus Haematopus that have chiefly black-and-white plumage and that feed on oysters, clams, mussels, etc.
- packing house — A packing house is a company that processes and packs food, especially meat, to be sold.
- parapsychosis — an abnormal psychosis
- past historic — the simple past
- peach blossom — the flower of the peach tree: the state flower of Delaware.
- pentastichous — (of plant leaves) arranged in five vertical rows
- petrophysical — relating to the analysis of the constitution and characteristics of rocks
- phantom stock — an employee bonus expressed as the cash value of a specified amount of company stock to be received at a future date, meant to create employee interest in raising stock prices without giving any stock away.
- pharmacognosy — materia medica (def 2).
- pharyngoscope — an instrument for inspecting the pharynx.
- pharyngoscopy — an examination by means of a pharyngoscope.
- phase encoded — (storage) (PE) A recording method used for 1600 BPI magnetic tapes. Compare NRZI, GCR.
- phelloplastic — an image or a representation that has been fashioned from cork
- philosophical — of or relating to philosophy: philosophical studies.
- phlogisticate — to integrate or blend phlogiston with
- phonocamptics — the branch of acoustics dealing with echoes
- photoacoustic — optoacoustic
- photodynamics — the science dealing with light and its effects on living organisms.
- photovoltaics — (used with a singular verb) a field of semiconductor technology involving the direct conversion of electromagnetic radiation as sunlight, into electricity.
- phyllocladous — having phylloclades.
- physharmonica — a keyboard musical instrument fitted with free reeds, and which is an early form of harmonium
- physiographic — the science of physical geography.
- physiological — of or relating to physiology.
- plain-clothes — Plain-clothes police officers wear ordinary clothes instead of a police uniform.
- poison sumach — an anacardiaceous swamp shrub, Rhus (or Toxicodendron) vernix of the southeastern US, that has greenish-white berries and causes an itching rash on contact with the skin
- post exchange — a retail store on an army installation that sells goods and services to military personnel and their dependents and to certain authorized civilian personnel. Abbreviation: PX.