13-letter words containing c, h, r, o
- orchidomaniac — a person who is obsessed with or has a passion for orchids
- orchiectomies — Plural form of orchiectomy.
- ornithichnite — (paleontology) The footmark of a bird occurring in strata of stone.
- ornithischian — any herbivorous dinosaur of the order Ornithischia, having a pelvis resembling that of a bird. Compare saurischian.
- ornithomantic — relating to ornithomancy
- orthocephalic — having a medium or intermediate relation between the height of the skull and the breadth or length.
- orthoepically — In terms of correct pronunciation.
- orthopaedical — Pertaining to orthopaedics; characteristic of orthopaedia.
- 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.
- outreach work — work (done by welfare workers, volunteers, etc) designed to help and encourage disadvantaged members of the community
- outstretching — Present participle of outstretch.
- over-achiever — to perform, especially academically, above the potential indicated by tests of one's mental ability or aptitude.
- overachievers — Plural form of overachiever.
- overachieving — Present participle of overachieve.
- overstretched — to stretch excessively.
- 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.
- panharmonicon — a mechanical instrument that imitates orchestral sounds
- parapsychosis — an abnormal psychosis
- parencephalon — a cerebral hemisphere
- parthenocarpy — the production of fruit without fertilization of an egg in the ovary.
- past historic — the simple past
- peacock chair — a wicker armchair with a high, circular back.
- perchlorinate — to combine with the maximum proportion of chlorine.
- perichondrium — the membrane of fibrous connective tissue covering the surface of cartilages except at the joints.
- petrochemical — a chemical substance obtained from petroleum or natural gas, as gasoline, kerosene, or petrolatum.
- petrophysical — relating to the analysis of the constitution and characteristics of rocks
- phallocentric — a doctrine or belief centered on the phallus, especially a belief in the superiority of the male sex.
- pharmacognosy — materia medica (def 2).
- pharmacologic — the science dealing with the preparation, uses, and especially the effects of drugs.
- pharmacopoeia — a book published usually under the jurisdiction of the government and containing a list of drugs, their formulas, methods for making medicinal preparations, requirements and tests for their strength and purity, and other related information.
- pharyngectomy — excision of part or all of the pharynx.
- pharyngoscope — an instrument for inspecting the pharynx.
- pharyngoscopy — an examination by means of a pharyngoscope.
- philanthropic — of, pertaining to, engaged in, or characterized by philanthropy; benevolent: a philanthropic foundation.
- phlebographic — relating to phlebography or the X-ray imaging of a vein that has been injected with a dye that is visible on the image taken
- phonoreceptor — a receptor stimulated by sound waves.
- photoallergic — photosensitive.
- photochromism — the reversible transformation of something's colour due to exposure to electromagnetic radiation such as sunlight
- photocomposer — a machine for setting type photographically.
- photodetector — photosensor.
- photoelectric — pertaining to the electronic or other electric effects produced by light.
- photoelectron — an electron emitted from a system by the photoelectric effect.
- photoreaction — a chemical reaction that involves or requires light.
- photoreceptor — a receptor stimulated by light.
- photorecorder — a device for making photographic records.
- phreatophytic — of, possessing the properties of, or relating to a phreatophyte
- phycoerythrin — a red protein pigment occurring in red algae.
- physharmonica — a keyboard musical instrument fitted with free reeds, and which is an early form of harmonium