12-letter words containing o, m, i
- approximator — Something that approximates.
- aqua ammonia — a water solution of ammonia; ammonia water; ammonium hydroxide
- archaic homo — collectively, the very robust, regionally differentiated human populations that lived in Europe, Asia, the Middle East, and Africa from 35,000 to 200,000 years ago.
- archesporium — archespore.
- archiphoneme — an abstract linguistic unit representing two or more phonemes when the distinction between these has been neutralized: conventionally shown by a capital letter within slashes, as /T/ for /t/ and /d/ in German Rat and Rad
- area bombing — aerial bombing in which bombs are dropped over the general area of a target.
- arithmomania — an obsessive desire to count objects, or a fixation with numbers and calculations
- army officer — a person in the army who holds a position of authority, responsibility and duty, especially one who holds a commission
- aromatically — having an aroma; fragrant or sweet-scented; odoriferous.
- art mobilier — small, movable art objects, especially primitive or prehistoric works of art.
- arteriograms — Plural form of arteriogram.
- arthrotomies — Plural form of arthrotomy.
- assimilation — an assimilating or being assimilated
- assimilators — Plural form of assimilator.
- assimilatory — characterized by assimilation; assimilating.
- assimulation — Obsolete form of assimilation.
- astigmometer — an apparatus for measuring the degree of astigmatism.
- astigmoscope — astigmatoscope.
- astonishment — Astonishment is a feeling of great surprise.
- astrochemist — (chemistry, astronomy) A chemist or astronomer whose speciality is astrochemistry.
- astrodynamic — Pertaining to astrodynamics.
- astronomical — If you describe an amount, especially the cost of something as astronomical, you are emphasizing that it is very large indeed.
- asymptomatic — If someone with a disease is asymptomatic, it means that they do not show any symptoms of the disease.
- asymptotical — of or relating to an asymptote.
- asynchronism — a lack of synchronism; occurrence at different times
- atmospherics — Atmospherics are elements in something such as a piece of music or a book which create a certain atmosphere.
- atmospherium — an optical system used to simulate images of atmospheric phenomena, as cloud formations, storms, and day and night, on the inside of a dome.
- atomic clock — an extremely accurate clock in which an electrical oscillator is controlled by the natural vibrations of an atomic or molecular system such as caesium or ammonia
- atomic power — nuclear power.
- auction room — a room in a building where auctions take place
- audio system — integrated equipment for producing amplified sound, as in a hi-fi or a mobile disco, or as a public-address system on stage
- augmentation — the act of augmenting or the state of being augmented
- auto-erotism — the arousal and satisfaction of sexual excitement within or by oneself, as by masturbation.
- autoimmunity — (pathology, immunology) The condition where one's immune system attacks one's own tissues, i.e., an autoimmune disorder.
- automaticity — the condition of being automatic, or the degree of this
- automatizing — Present participle of automatize.
- automobiling — (dated) present participle of automobile.
- automobilism — the use of automobiles, or the practices associated with them
- automobilist — Driver; person who uses a motor vehicle such as car, van or truck.
- automobility — the use of motor cars
- automorphism — the practice of seeing others as having the same characteristics as oneself
- autorhythmic — That generates its own rhythm.
- autotoxaemia — autointoxication.
- autumn olive — a spiny shrub (Elaeagnus umbellata) of the oleaster family, having leaves covered with silvery or brown scales
- avitaminosis — any disease caused by a vitamin deficiency in the diet
- avitaminotic — of or relating to avitaminosis
- axiom schema — (logic) A formula in the language of an axiomatic system, containing one or more. These metasyntactic variables (or "schematic variables") that stand for terms or subformulae. An example is the Axiom of Comprehension.
- ayuntamiento — (in Spain) a municipal council
- azithromycin — A macrolide antibiotic derived from erythromycin.
- baby monitor — a device that transmits sounds made by a baby to another room