12-letter words containing p, e, r, t
- extemporised — Simple past tense and past participle of extemporise.
- extemporized — Simple past tense and past participle of extemporize.
- extemporizer — One who extemporizes.
- extemporizes — Third-person singular simple present indicative form of extemporize.
- exteroceptor — A sensory receptor that receives external stimuli.
- extracampine — (psychiatry, of hallucination) Beyond the possible sensory field.
- extrahepatic — Originating or occurring outside the liver.
- extrapolated — Simple past tense and past participle of extrapolate.
- extrapolates — Third-person singular simple present indicative form of extrapolate.
- extremophile — A microorganism, especially an archaean, that lives in conditions of extreme temperature, acidity, alkalinity, or chemical concentration.
- extropianism — Belief in, or support for, the theory of extropy.
- feather palm — any palm having large pinnate or bipinnate leaves, as the date palm or royal palm.
- fermat prime — (mathematics) A prime number of the form 2^2^n + 1. Any prime number of the form 2^n+1 must be a Fermat prime. Fermat conjectured in a letter to someone or other that all numbers 2^2^n+1 are prime, having noticed that this is true for n=0,1,2,3,4. No further Fermat primes are known; several have been factorised, and several more have been proved composite without finding explicit factorisations.
- fetoproteins — Plural form of fetoprotein.
- fiber optics — the branch of optics that deals with the transmission of light through transparent fibers, as in the form of pulses for the transmission of data or communications, or through fiber bundles for the transmission of images.
- fibre optics — optical fibre
- field sports — sports carried on in the open countryside, such as hunting, shooting, or fishing
- filter paper — porous paper used in filtering.
- filter press — an apparatus used for filtration consisting of a set of frames covered with filter cloth on both sides, between which the liquid to be filtered is pumped
- finger paint — paint children apply with fingers
- finger-paint — a jellylike paint, used chiefly by children in painting, usually with their fingers.
- fingerprints — Plural form of fingerprint.
- fire support — support given by artillery and aircraft to infantry and armored vehicles.
- first empire — the empire (1804–14) established in France by Napoleon Bonaparte.
- first person — the grammatical person used by a speaker in statements referring to himself or herself (first person singular) or to a group including himself or herself (first person plural)
- flavoprotein — an enzyme, containing riboflavin and linked chemically with a protein, active in the oxidation of foods in animal cells.
- fleet prison — (formerly) a London prison, esp used for holding debtors
- floor pocket — one of several metal boxes placed backstage in the floor (floor pocket) or wall of a theater and containing jacks for electric cables used in lighting units.
- flow pattern — The flow pattern is the way in which fluids move through a reactor.
- fluorapatite — a crystalline mineral, Ca 5 (PO 4) 3 F, formed from hydroxyapatite in the presence of fluoride, that has a hardening effect on bones and teeth.
- foetoprotein — Alternative spelling of fetoprotein.
- fore-topmast — the spar or section of a pole mast serving as the topmast of a foremast on a ship.
- fore-topsail — a topsail set on a foremast on a ship.
- foretopmasts — Plural form of foretopmast.
- foretopsails — Plural form of foretopsail.
- fort pickens — Andrew, 1739–1817, American Revolutionary general.
- fortepianist — the player of a fortepiano
- fortified pa — a Māori hilltop dwelling with trenches and palisades for defensive occupation
- foundry type — type cast in individual characters for setting by hand.
- four-striper — a captain in the U.S. Navy.
- freeing port — an opening in the bottom of a bulwark, for rapid drainage of a weather deck in heavy seas; scupper.
- french pleat — curtain, draperies
- fried potato — Fried potatoes are pieces of potato cooked in oil or fat.
- frontispiece — an illustrated leaf preceding the title page of a book.
- fruit-picker — a person or a tool that picks fruit from trees
- fuel poverty — the state of being unable to afford to heat one's home adequately
- future-proof — (of a system, computer, program, etc) guaranteed not to be superseded by future versions, developments, etc
- galactophore — a galactophorous duct.
- gametophores — Plural form of gametophore.
- gangster rap — a type of rap music whose lyrics feature violence, sexual exploits, and the like.