11-letter words containing i, a, t, r, o
- aprioristic — belief in, or reliance upon, a priori reasoning, arguments, or principles.
- aqua fortis — nitric acid
- aquafortist — a person who makes engravings or etchings through the use of aqua fortis
- arabization — transfer to Arab control
- araeometric — relating to araeometry
- arbitration — Arbitration is the judging of a dispute between people or groups by someone who is not involved.
- arbitrators — Plural form of arbitrator.
- arbor vitae — any of several Asian and North American evergreen coniferous trees of the genera Thuja and Thujopsis, esp Thuja occidentalis, having tiny scalelike leaves and egglike cones
- arborvitaes — Plural form of arborvitae.
- archicortex — (anatomy) Part of the allocortex, specifically three layered hippocampal cortexes necessary for hippocampus formation.
- architector — (obsolete) An architect.
- archtraitor — A chief or transcendent traitor.
- arctic zone — the section of the earth's surface lying between the Arctic Circle and the North Pole.
- arcticology — the scientific study of the Polar Regions.
- arctophilia — the practice of collecting teddy bears
- areocentric — relating to a reference system which has Mars as its centre
- aristocracy — The aristocracy is a class of people in some countries who have a high social rank and special titles.
- aristocrats — Plural form of aristocrat.
- aristoteles — a walled plain in the first quadrant of the face of the moon: about 60 miles (97 km) in diameter.
- arkeologist — Someone who studies the story of Noah's Ark, particularly by searching for physical evidence which would corroborate it.
- aroint thee — away! begone!
- aromaticity — the property of certain planar cyclic conjugated molecules, esp benzene, of behaving like unsaturated molecules and undergoing substitution reactions rather than addition as a result of delocalization of electrons in the ring
- aromatizing — Present participle of aromatize.
- arrestation — the slowing or stopping of the development or progress of something
- ars poetica — the art of poetry
- art history — study of art through the ages
- arteriogram — an X-ray of a vein or artery which has been injected with dye in order to diagnose obstruction or damage
- arteriotomy — the surgical cutting of an artery or a cut made in an artery
- arthrodesis — the fusion of bones in a joint through surgery which causes immobility of the joint
- articulator — a person or thing that articulates
- artiodactyl — any placental mammal of the order Artiodactyla, having hooves with an even number of toes; an even-toed ungulate. The order includes pigs, hippopotamuses, camels, deer, cattle, and antelopes
- artophorion — pyx (def 1a).
- arytenoidal — relating to the arytenoid cartilages in the larynx and also to other parts relating to them
- asbestiform — having the look or structure of asbestos
- ascriptions — Plural form of ascription.
- asperations — Plural form of asperation.
- aspergation — the action of sprinkling, suffusing or irrigating with water
- asphyxiator — to produce asphyxia in.
- aspirations — a strong desire, longing, or aim; ambition: intellectual aspirations.
- asportation — the removal or taking away of something
- assertation — An assertion, statement of opinion.
- assimilator — to take in and incorporate as one's own; absorb: He assimilated many new experiences on his European trip.
- associators — Plural form of associator.
- assortative — Denoting or involving the preferential mating of animals or marrying of people with similar characteristics.
- asteroidean — an echinoderm of the class Asteroidea, comprising the starfishes.
- astraphobia — a fear of thunder and lightning
- astrogation — (in science fiction) navigation in outer space.
- astrologian — (obsolete) An astrologer.
- astrologist — the study that assumes and attempts to interpret the influence of the heavenly bodies on human affairs.
- astrometric — (astronomy) of or relating to astrometry.