16-letter words containing o, p, e, r, a
- a propos de rien — apropos of nothing; with reference to nothing in particular.
- acanthopterygian — of, relating to, or belonging to the Acanthopterygii, a large group of teleost fishes having spiny fin rays. The group includes most saltwater bony fishes
- access programme — a television or radio programme made by the general public as distinguished from one made by professional broadcasters
- accordion pleats — tiny knife pleats
- acetyl promazine — acepromazine
- acid house party — a professionally organized party for young people, with Acid House music, sometimes held in a field or disused building
- acid metaprotein — a metaprotein derived by means of a hydrolytic acid.
- acoustic coupler — a device converting computer-data signals into acoustic form for transmission down a telephone line, through the handset microphone
- acoustic torpedo — a torpedo guided by sound that either emanates from the target or is emitted by the torpedo and bounces off the target.
- acroparaesthesia — a persistent sensation of numbness and tingling in the hands and feet
- actinopterygians — Plural form of actinopterygian.
- active transport — a process by which molecules are enabled to pass across a membrane from a region in which they are in a low concentration to one of high concentration; this requires the expenditure of energy in metabolism and is assisted by carrier proteins, commonly referred to as pumps
- adaptive routing — dynamic routing
- addition polymer — a polymer formed by the direct reaction of two or more monomers, and with no resulting water or other by-product.
- additive process — a photographic process in which the desired colours are produced by adding together appropriate proportions of three primary colours
- aerometeorograph — an aircraft instrument that records temperature, humidity, and atmospheric pressure
- aerotherapeutics — the treatment of disease by the use of air, esp. by exposing patients to changes in atmospheric pressure
- agreed procedure — an official set of guidelines of the steps that should be followed in the event of a dispute between two parties, esp in arbitration between employee and employer
- airmail envelope — an envelope made of the very thin blue paper that is used to send letters by airmail
- all over the map — changeable
- alligator pepper — a tropical African zingiberaceous plant, Amomum melegueta, having red or orange spicy seed capsules
- alpha conversion — (theory) In lambda-calculus and reduction, the renaming of a formal parameter in a lambda abstraction. This does not change the meaning of the abstraction. For example: \ x . x+1 <--> \ y . y+1 If the actual argument to a lambda abstraction contains instances of the abstraction's formal parameter then it is necessary to rename the parameter before applying the abstraction to avoid name capture.
- alpha-interferon — interferon (def 2).
- alpha-tocopherol — Alpha-tocopherol is a form of vitamin E.
- alveolar process — the ridgelike border of the upper and lower jaws containing the sockets of the teeth.
- american cowslip — shooting star (def 2).
- amerigo vespucci — Amerigo [uh-mer-i-goh;; Italian ah-me-ree-gaw] /əˈmɛr ɪˌgoʊ;; Italian ˌɑ mɛˈri gɔ/ (Show IPA), (Americus Vespucius) 1451–1512, Italian merchant, adventurer, and explorer after whom America was named.
- ancestor worship — (in certain societies) the veneration of ancestors whose spirits are frequently held to possess the power to influence the affairs of the living.
- anode dark space — the dark region between the anode glow and the anode in a vacuum tube, occurring when the pressure is low.
- anterioposterior — Alternative form of anteroposterior.
- anthropocentrism — an anthropocentric theory or view.
- anthropometrical — Pertaining to anthropometry.
- anthropomorphise — Non-Oxford British standard spelling of anthropomorphize.
- anthropomorphize — to attribute or ascribe human form or behaviour to (a god, animal, object, etc)
- anthropophagites — Plural form of anthropophagite.
- anthroposemiotic — Of or pertaining to anthroposemiotics.
- anti-progressive — favoring or advocating progress, change, improvement, or reform, as opposed to wishing to maintain things as they are, especially in political matters: a progressive mayor.
- antihypertension — Pathology. elevation of the blood pressure, especially the diastolic pressure. an arterial disease characterized by this condition.
- antoinette perry — Antoinette, 1888–1946, U.S. actress, theatrical manager, and producer.
- apollo belvedere — a Roman marble statue, possibly a copy of a Greek original of the 4th–1st centuries b.c.
- apparent horizon — the apparent line that divides the earth and the sky
- appearance money — Appearance money is money paid to a famous person such as a sports star or film star for taking part in a public event.
- apple of discord — a golden apple inscribed "For the fairest". It was claimed by Hera, Athena, and Aphrodite, to whom Paris awarded it, thus beginning a chain of events that led to the Trojan War
- apple tree borer — Also called flatheaded apple tree borer. the larva of a metallic wood-boring beetle, Chrysobothris femorata, that bores into the wood of apple and other fruit trees.
- appraisal method — a method used for the appraisal of an employee
- approachableness — capable of being approached; accessible.
- aromatherapeutic — Of or pertaining to aromatherapy.
- arteriocapillary — Relating to the arteries and the capillaries.
- aston dark space — the dark region between the cathode and the cathode glow in a vacuum tube, occurring when the pressure is low.
- atmospheric tide — a movement of atmospheric masses caused by the gravitational attraction of the sun and moon and by daily solar heating.
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