12-letter words containing er
- antwerp blue — any of several iron-blue pigments, usually containing a considerable amount of extender.
- aperiodicity — not periodic; irregular.
- apperceiving — Present participle of apperceive.
- apperception — the attainment of full awareness of a sensation or idea
- apperceptive — conscious perception.
- appercipient — having or using apperception
- appertaining — to belong as a part, right, possession, attribute, etc.; pertain or relate (usually followed by to): privileges that appertain to members of the royal family.
- apple butter — a jam made from stewed spiced apples
- apple sucker — a small homopterous insect, Psyllia mali, originally of Europe, that is a serious pest of apple crops.
- appleknocker — Northern U.S. a rustic.
- appletviewer — (web, testing) A simplified web browser used for testing applets. You can't browse HTML with it but you can run applets to test them before embedding them in a web page.
- aramid fiber — a fiber having resistance to high temperatures and great strength, formed from an aramid and used in materials for bulletproof vests and radial tires.
- archenterons — Plural form of archenteron.
- archeopteryx — A specimen of the species Archaeopteryx lithographica, being the earliest and most primitive known bird, representing a transition in the evolution of dinosaurs to birds.
- archerfishes — Plural form of archerfish.
- area manager — a manager of a business, organization, etc who has responsibility for a specific geographical area
- armourbearer — One who carries armor for another.
- army officer — a person in the army who holds a position of authority, responsibility and duty, especially one who holds a commission
- aromatherapy — Aromatherapy is a type of treatment which involves massaging the body with special fragrant oils.
- arquebusiers — harquebusier.
- arseniferous — Lb geology Containing or producing arsenic.
- art mobilier — small, movable art objects, especially primitive or prehistoric works of art.
- artaxerxes i — died 425 bc, king of Persia (465–425): son of Xerxes I
- arterialized — Simple past tense and past participle of arterialize.
- arteriograms — Plural form of arteriogram.
- arteriopathy — Any disease of the arteries.
- arthrobacter — a genus of rod-shaped or spherical bacteria found in the soil.
- artillerists — Plural form of artillerist.
- artilleryman — a serviceman who serves in an artillery unit
- artillerymen — Plural form of artilleryman.
- as per usual — as usual
- ascertaining — to find out definitely; learn with certainty or assurance; determine: to ascertain the facts.
- assertations — Plural form of assertation.
- asseverating — Present participle of asseverate.
- asseveration — the act of asseverating.
- asseverative — characterized by or relating to solemn declaration or affirmation
- asteriskless — having no asterisk
- astigmatizer — a cylindrical lens used in a rangefinder to draw out the point image of a point source into a line.
- astigmometer — an apparatus for measuring the degree of astigmatism.
- at intervals — If something happens at intervals, it happens several times with gaps or pauses in between.
- atheromatous — a sebaceous cyst.
- 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.
- atom smasher — accelerator (sense 3)
- atomic power — nuclear power.
- auctioneered — Simple past tense and past participle of auctioneer.
- auger effect — the spontaneous emission of an electron instead of a photon by an excited ion as a result of a vacancy being filled in an inner electron shell
- auger shower — a shower of electrons, photons, etc. resulting from the collision of primary cosmic rays with atomic nuclei in the atmosphere
- auto-erotism — the arousal and satisfaction of sexual excitement within or by oneself, as by masturbation.
- autoanalyzer — any of various automatic devices that test and analyze chemicals, blood, etc.