13-letter words containing a, r, u, n
- equilibrating — Present participle of equilibrate.
- equilibration — The formation, or maintenance, of an equilibrium.
- equipartition — the equal division of the energy of a system in thermal equilibrium between different degrees of freedom. This principle was assumed to be exact in classical physics, but quantum theory shows that it is true only in certain special cases
- equiponderant — of the same weight; evenly balanced
- equiponderate — To counterbalance.
- eta reduction — eta conversion
- ethnocultural — Relating to or denoting a particular ethnic group.
- eureka moment — a moment at which a person realizes or solves something
- european plan — a hotel rate of charging covering room and service but not meals
- european sole — Solea solea, a tongue-shaped flatfish of the family Soleidae, also known as Dover sole or common sole: prefers shallow waters and is highly valued as a food fish
- european toad — a European toad, Alytes obstetricans, the male of which carries the fertilized eggs on its hind legs until they hatch: family Discoglossidae
- european wasp — a large black-and-yellow banded wasp, Vespula germanica, native to Europe, North Africa, and Asia, now established in Australasia and the US
- eusporangiate — (of ferns) having each sporangium developing from a group of cells, rather than a single cell, and with no specialized dispersal of spores
- faerie queene — a chivalric romance in verse (1590–96) by Edmund Spenser.
- fairy penguin — a small penguin, Eudyptula minor, with a bluish head and back, found on the Australian coast
- fantin-latour — (Ignace) Henri (Joseph Théodore) [ee-nyas ahn-ree zhaw-zef tey-aw-dawr] /iˈnyas ɑ̃ˈri ʒɔˈzɛf teɪ ɔˈdɔr/ (Show IPA), 1836–1904, French painter.
- farmer's lung — a lung disorder caused by inhalation of moldy hay dust, marked by shortness of breath, dry cough, and weight loss.
- fault current — A fault current is a current that results from a fault.
- ferae naturae — (of animals) wild or undomesticated (distinguished from domitae naturae).
- ferroaluminum — a ferroalloy containing up to 80 percent aluminum.
- ferrotitanium — a ferroalloy containing up to 45 percent titanium.
- ferrovanadium — a ferroalloy containing up to 55 percent vanadium.
- fiddle around — waste time doing sth trivial
- final curtain — end of a theatre performance
- fine adjuster — (jargon, tool, humour) A tool used for percussive maintenance, also known as a "hammer".
- fish geranium — zonal geranium.
- flavopurpurin — a yellow, crystalline anthraquinone dye, C 14 H 8 O 5 , isomeric with purpurin.
- floor furnace — a small self-contained furnace placed just below the floor of the space to be heated.
- flunitrazepam — a powerful benzodiazepine sedative, C 16 H 12 FN 3 O 3 , that causes semiconsciousness and memory blackouts: has been implicated in date rapes and is illegal in the U.S.
- fluorocarbons — Plural form of fluorocarbon.
- flying saucer — any of various disk-shaped objects allegedly seen flying at high speeds and altitudes, often with extreme changes in speed and direction, and thought by some to be manned by intelligent beings from outer space.
- formularising — Present participle of formularise.
- formularizing — Present participle of formularize.
- fortunateness — The quality of being fortunate; fortune; luck.
- foundationary — the basis or groundwork of anything: the moral foundation of both society and religion.
- fractiousness — refractory or unruly: a fractious animal that would not submit to the harness.
- fracture zone — a long, narrow rift on the ocean floor, separating areas of differing depth: where such a zone crosses a mid-ocean ridge, it displaces the ridge by faulting.
- french guiana — an overseas department of France, on the NE coast of South America: formerly a French colony. 35,135 sq. mi. (91,000 sq. km). Capital: Cayenne.
- french guinea — former name of Guinea.
- frequentation — the practice of frequenting; habit of visiting often.
- frequentative — noting or pertaining to a verb aspect expressing repetition of an action.
- freudian slip — (in Freudian psychology) an inadvertent mistake in speech or writing that is thought to reveal a person's unconscious motives, wishes, or attitudes.
- frontal gyrus — any of several convolutions on the outer surface of the frontal lobe of the cerebrum.
- fruit farming — the practice of growing or farming fruit
- fruit machine — gambling: slot machine
- frumentaceous — of the nature of or resembling wheat or other grain.
- frumentarious — of or relating to wheat or a similar grain
- frustratingly — to make (plans, efforts, etc.) worthless or of no avail; defeat; nullify: The student's indifference frustrated the teacher's efforts to help him.
- fuerteventura — a Spanish island off the NW coast of Africa, one of the Canary Islands. 641 sq. mi. (1660 sq. km).
- fulani empire — a powerful W African Muslim state that flourished in the 19th century in the area of present-day Nigeria.