14-letter words starting with o
- ordinary point — Mathematics. a point in a domain in which a given function of a complex variable is analytic.
- ordinary share — British. a share of common stock.
- ordinary stock — British. common stock.
- ordnance corps — a combat support military unit responsible for developing and maintaining weapons and weapon systems
- ordnance datum — mean sea level calculated from observation taken at Newlyn, Cornwall, and used as the official basis for height calculation on British maps
- organ of corti — Anatomy, Zoology. a structure in the cochlea of a mammal, consisting of hair cells that serve as receptors for auditory stimuli.
- organic matter — matter derived from organisms, esp decayed matter in soil
- organisational — (British) alternative spelling of organizational.
- organizability — The suitability or potential for organization.
- organizational — the act or process of organizing.
- organochlorine — Any of a large group of pesticides and other synthetic organic compounds with chlorinated aromatic molecules.
- organometallic — pertaining to or noting an organic compound containing a metal or a metalloid linked to carbon.
- organosiloxane — a siloxane containing an organic group.
- orient express — an express passenger train in service between Paris and Istanbul from 1883 until 1977, using various routes. Some or parts of the routes continue to be served by regular service and by rail tours.
- oriental poppy — a poppy, Papaver orientale, of Asia, having bristly stems and leaves and showy scarlet, pink, or white flowers, cultivated as an ornamental.
- oriental topaz — a variety of corundum resembling topaz in colour and used as a gemstone
- orkney islands — group of islands north of Scotland, constituting an administrative division of Scotland: 377 sq mi (976 sq km); pop. 20,000
- ornamentations — Plural form of ornamentation.
- ornithischians — Plural form of ornithischian.
- ornithological — the branch of zoology that deals with birds.
- ornithologists — Plural form of ornithologist.
- ornithomorphic — relating to an ornithomorph
- orobanchaceous — belonging to the Orobanchaceae, the broomrape family of plants.
- orphan process — (operating system) A Unix process whose original parent has terminated and which has become a child of "init(1)". Compare zombie.
- orphans' court — a probate court in certain U.S. states.
- orthochromatic — representing correctly the relations of colors as found in a subject; isochromatic.
- orthodox sleep — dreamless sleep, characterized by a slow alpha rhythm of brain waves and no marked physiological changes.
- orthographical — Of, or relating to orthography; spelled correctly.
- orthomolecular — being or pertaining to the treatment of disease by increasing, decreasing, or otherwise controlling the intake of natural substances, especially vitamins. Compare megavitamin (def 1).
- orthomyxovirus — Any RNA virus of Orthomyxoviridae family characterised by having two long glycoprotein spikes.
- orthonormalize — (mathematics) To make a set of vectors both orthogonal and normalized.
- orthophosphate — a salt or ester of orthophosphoric acid, or any compound containing the trivalent group −PO 4 .
- orthopterology — the study of the Orthoptera
- orthoselection — orthogenesis (def 1a).
- oscillographic — Of or pertaining to an oscillograph.
- osmoconformers — Plural form of osmoconformer.
- osmoregulation — the process by which cells and simple organisms maintain fluid and electrolyte balance with their surroundings.
- osmoregulatory — Of or pertaining to osmoregulation.
- ostentatiously — characterized by or given to pretentious or conspicuous show in an attempt to impress others: an ostentatious dresser.
- osteoarthritic — Affected with osteoarthritis.
- osteoarthritis — the most common form of arthritis, usually occurring after middle age, marked by chronic breakdown of cartilage in the joints leading to pain, stiffness, and swelling.
- osteoarthroses — chronic, noninflammatory arthritis.
- osteoarthrosis — chronic, noninflammatory arthritis.
- osteochondroma — (medicine) A benign tumor consisting of bone or cartilage.
- osteodermatous — characterized by osteodermal skin
- osteodystrophy — (medicine) Any abnormal or defective development of a bone.
- osteogenically — By osteogenesis.
- osteologically — Concerning only the osteological aspects.
- osteosarcomata — Plural form of osteosarcoma.
- osteosclerosis — abnormal hardening and increase in density of bone.