18-letter words containing h, e, t, a, i
- oil of catechumens — holy oil used in baptism, the ordination of a cleric, the coronation of a sovereign, or in the consecration of a church.
- on that/this score — You can use on that score or on this score to refer to something that has just been mentioned, especially an area of difficulty or concern.
- on the danger list — critically ill in hospital
- one's native heath — the place of one's birth or childhood
- optical brightener — an additive that dyes and brightens fabric or paper
- oriental cockroach — a dark-brown cockroach, Blatta orientalis, thought to have originated in Asia but now nearly cosmopolitan in distribution.
- oriental shorthair — any of a breed of domestic cat, similar to the Siamese but with greenish eyes and often a coat of a solid color
- outer automorphism — an automorphism that is not an inner automorphism.
- ovariohysterectomy — Surgical removal of the ovaries and uterus.
- over and done with — If you say that something is over and done with, you mean that it is completely finished and you do not have to think about it any more.
- overnight telegram — a type of domestic telegram sent at a reduced rate with a minimum charge for 10 words or less and accepted until midnight for delivery the following day.
- packet switch node — (PSN) A dedicated computer whose purpose is to accept, route and forward packets in a packet-switched network.
- paint the town red — a substance composed of solid coloring matter suspended in a liquid medium and applied as a protective or decorative coating to various surfaces, or to canvas or other materials in producing a work of art.
- parachute regiment — an airborne regiment of an army
- passive euthanasia — a form of euthanasia in which medical treatment that will keep a dying patient alive for a time is withdrawn
- pennsylvania dutch — the descendants of 17th- and 18th-century settlers in Pennsylvania from southwest Germany and Switzerland.
- peppermint camphor — menthol.
- peter tschaikowsky — Peter Ilyich [il-yich] /ˈɪl yɪtʃ/ (Show IPA), Tchaikovsky, Peter Ilyich.
- phanerocrystalline — (of a rock) having the principal constituents in the form of crystals visible to the naked eye.
- phase-shift keying — (communications) (PSK) A digital modulation scheme that conveys data by changing the phase of a carrier wave. The data can either determine the absolute phase relative to the unmodulated carrier or reference signal ("coherent phase-shift keying", CPSK) or the change in phase ("differential phase-shift keying", DPSK). The number of different phases used determines the amount of data that can be transmitted in each cycle. Each cycle can be considered to constitute one "symbol", e.g. with two possible phases, each cycle carries one bit. The more phases that are used, the less tollerant to noise the transmissions becomes. Alternatives to PSK are amplitude-shift keying (ASK) and frequency-shift keying (FSK).
- phosphatidylserine — any of a class of phospholipids occurring in biological membranes and fats
- photochemical smog — air pollution containing ozone and other reactive chemical compounds formed by the action of sunlight on nitrogen oxides and hydrocarbons, especially those in automobile exhaust.
- photoisomerization — isomerization induced by light.
- photosensitization — to make (a material) photosensitive, as by the application of a photosensitive emulsion.
- phthalic anhydride — a white, crystalline, slightly water-soluble solid, C 8 H 4 O 3 , used chiefly in the manufacture of dyes, alkyd resins, and plasticizers.
- physical chemistry — the branch of chemistry dealing with the relations between the physical properties of substances and their chemical composition and transformations.
- physical education — systematic instruction in sports, exercises, and hygiene given as part of a school or college program.
- physical inventory — To carry out a physical inventory is to count all the stock on hand.
- physical therapist — sb who performs physiotherapy
- phytohemagglutinin — a lectin, obtained from the red kidney bean, that binds to the membranes of T cells and stimulates metabolic activity, cell division, etc.
- policeman's helmet — a Himalayan balsaminaceous plant, Impatiens glandulifera, with large purplish-pink flowers, introduced into Britain
- positively charged — having a positive charge
- potassium chlorate — a white or colorless, crystalline, water-soluble, poisonous solid, KClO 3 , used chiefly as an oxidizing agent in the manufacture of explosives, fireworks, matches, bleaches, and disinfectants.
- potassium chloride — a white or colorless, crystalline, water-soluble solid, KCl, used chiefly in the manufacture of fertilizers and mineral water, and as a source of other potassium compounds.
- potassium sulphate — a soluble substance usually obtained as colourless crystals of the decahydrate: used in making glass and as a fertilizer. Formula: K2SO4
- prison authorities — the people in charge of running a prison
- probability theory — the theory of analyzing and making statements concerning the probability of the occurrence of uncertain events. Compare probability (def 4).
- processionary moth — a moth of the family Thaumetopoeidae, esp the oak processionary moth (Thaumetopoea processionea), the larvae of which leave the communal shelter nightly for food in a V-shaped procession
- projection machine — an apparatus that projects motion pictures; projector.
- proprietary rights — rights of ownership
- protease inhibitor — a drug that inhibits the action of protease, especially any of a class of antiviral drugs that prevent the cleavage and replication of HIV proteins.
- provision merchant — a person or company in the business of retailing food and other provisions
- pseudo-anarchistic — a person who advocates or believes in anarchy or anarchism.
- psychotherapeutics — psychotherapy.
- punishment beating — a form of corporal punishment carried out by a paramilitary organization on a member of another sectarian organization, usually in Northern Ireland
- pyramus and thisbe — (in Greek legend) two lovers of Babylon: Pyramus, wrongly supposing Thisbe to be dead, killed himself and she, encountering him in his death throes, did the same
- quasi-metaphysical — pertaining to or of the nature of metaphysics.
- quick off the mark — If you are quick off the mark, you are quick to understand or respond to something. If you are slow off the mark, you are slow to understand or respond to something.
- quite the contrary — not at all, the very opposite
- rear its ugly head — the upper part of the body in humans, joined to the trunk by the neck, containing the brain, eyes, ears, nose, and mouth.