11-letter words containing o, p, e, r, a, t
- absorptance — a measure of the ability of an object to absorb radiation, equal to the ratio of the absorbed radiant flux to the incident flux. For a layer of material the ratio of the flux absorbed between the entry and exit surfaces of the layer to the flux leaving the entry surface is the internal absorptance
- acropetally — in an upward direction, towards the apex
- adipocerite — hatchettite.
- aeolotropic — anisotropic
- aero-optics — the study of the effect of aircraft-induced and atmospheric disturbances on the efficiency of laser weapons
- aerotropism — the growth of plants towards or away from a source of oxygen
- aminopterin — a derivative of pterin used in chemotherapy
- anaplerotic — of or relating to anaplerosis
- anastrophes — Plural form of anastrophe.
- anisopteran — belonging or pertaining to the suborder Anisoptera, comprising the dragonflies.
- anteportico — a lesser portico preceding a main portico.
- antihyperon — the antiparticle of the hyperon
- antileprosy — acting against leprosy
- antipoverty — acting against poverty
- antistrophe — the second of two movements made by a chorus during the performance of a choral ode
- apertometer — an instrument for measuring the angular and numerical aperture of the objective lens of a microscope.
- apodyterium — the changing room in an ancient Roman bathhouse
- apoferritin — a homogeneous protein, found especially in the intestinal mucosa and the liver, that interacts with a ferric hydroxide-ferric phosphate complex to form ferritin.
- aponeurotic — a whitish, fibrous membrane that connects a muscle to a bone or fascia.
- apoproteins — Plural form of apoprotein.
- apostlebird — an omnivorous bird, Struthidea cinerea, of eastern Australia, that has chiefly dark gray-brown plumage with white tail markings and is noted for its habit of traveling in groups of about 12 related individuals.
- apostrophes — Plural form of apostrophe.
- apportioned — to distribute or allocate proportionally; divide and assign according to some rule of proportional distribution: to apportion expenses among the three men.
- apportioner — to distribute or allocate proportionally; divide and assign according to some rule of proportional distribution: to apportion expenses among the three men.
- apprecation — (obsolete) Earnest prayer; devout wish.
- appreciator — to be grateful or thankful for: They appreciated his thoughtfulness.
- approacheth — Archaic third-person singular form of approach.
- approbative — showing approbation or approval
- appropriate — Something that is appropriate is suitable or acceptable for a particular situation.
- approvement — (obsolete, Old English law) Improvement of common lands by converting them for advantage of the landlord.
- approximate — An approximate number, time, or position is close to the correct number, time, or position, but is not exact.
- apron stage — a stage that projects into the auditorium so that the audience sit on three sides of it
- armor plate — a protective covering of specially hardened steel plates, as on a tank
- ars poetica — the art of poetry
- arte povera — a style of minimal art originating in Italy in the late 1960s, making use of cheap and commonly available materials such as stones, newspapers etc
- arthroscope — a tubular instrument that is inserted into the capsule of a joint to examine the joint, extract tissue, etc
- arthrospore — a sporelike cell of ascomycetous fungi and some algae produced by a breaking of the hyphae
- asperations — Plural form of asperation.
- aspergation — the action of sprinkling, suffusing or irrigating with water
- asteropaeus — a Trojan ally slain by Achilles.
- astrosphere — the part of the aster excluding the centrosome
- atmosphered — having an intellectual or psychological climate or feeling
- atmospheres — Plural form of atmosphere.
- atmospheric — Atmospheric is used to describe something which relates to the Earth's atmosphere.
- atriopeptin — any of several peptide hormones that are released by the atria of the heart in response to an abnormal increase in blood volume and that modulate blood pressure and the excretion of sodium, potassium, and water. Abbreviation: ANF.
- auto-repeat — a feature of computer keys whereby a character is generated repeatedly as long as the user holds down the key in question
- autographed — Simple past tense and past participle of autograph.
- axerophthol — any form of vitamin A
- backstopper — a wall, wire screen, or the like, serving to prevent a ball from going too far beyond the normal playing area.
- baroceptors — Plural form of baroceptor.
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