12-letter words containing i, p, r
- eriskay pony — a breed of medium-sized pony, typically grey, with a dense waterproof coat. The Eriskay is the only surviving variety of the native ponies of the Western Isles of Scotland
- erythropenia — A decrease in the number of erythrocytes, associated with anemia.
- ethnographic — Relating to ethnography.
- euphorically — In a euphoric manner.
- eutrophicate — (ecology, intransitive) To become eutrophic.
- evaporations — Plural form of evaporation.
- ex-president — a former chief executive or head of state of a republic
- examinership — the office or function of an examiner
- exasperating — Intensely irritating; infuriating.
- exasperation — A feeling of intense irritation or annoyance.
- exasperative — having an exasperating or irritating nature
- executorship — The office or position of an executor.
- expansionary — (of a policy or action) intended to result in economic or political expansion.
- expatriating — Present participle of expatriate.
- expatriation — Voluntary migration from one's native land to another.
- expatriatism — The condition of being an expatriate, especially a deliberate one.
- expenditures — Plural form of expenditure.
- experiencing — Present participle of experience.
- experiential — Involving or based on experience and observation.
- experimental — (of a new invention or product) based on untested ideas or techniques and not yet established or finalized.
- experimented — Simple past tense and past participle of experiment.
- experimenter — A person who experiments.
- explorations — Plural form of exploration.
- export drive — a united effort to increase a country's exports
- express mail — mail delivered quicker than normal mail
- expressional — Of or pertaining to expression, either in language, the face or the arts.
- expressively — In an expressive manner.
- expressivity — (uncountable) The quality of being expressive.
- exprobration — the act of reproaching
- exprobrative — signifying reproach, reproachful
- expromission — the act of (a creditor) accepting a new debtor as being responsible for the debt of another person
- expropriated — Simple past tense and past participle of expropriate.
- expropriates — Third-person singular simple present indicative form of expropriate.
- 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.
- extracampine — (psychiatry, of hallucination) Beyond the possible sensory field.
- extrahepatic — Originating or occurring outside the liver.
- 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.
- factory ship — a whaling ship equipped to process killed whales and to transport the oil and by-products.
- fairy shrimp — any member of the crustacean order Anostraca, characterized by an elongate trunk with more than 20 segments and the absence of a carapace, typically found swimming ventral side up in fresh water.
- 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