18-letter words containing n, o, t, a, h, i
- inner automorphism — an automorphism that maps an element x into an element of the form axa −1 where a −1 is the inverse of a.
- inter-relationship — reciprocal relation.
- interrelationships — Plural form of interrelationship.
- ionization chamber — a device for detecting and measuring ionizing radiation, consisting of a tube containing a low pressure gas and two electrodes between which a high voltage is maintained. The current between the electrodes is a function of the intensity of the radiation
- iron (ii) sulphate — an iron salt with a saline taste, usually obtained as greenish crystals of the heptahydrate, which are converted to the white monohydrate above 100°C: used in inks, tanning, water purification, and in the treatment of anaemia. Formula: FeSO4
- isolation hospital — a hospital used to isolate or quarantine people with a contagious disease
- japanese artichoke — Chinese artichoke.
- junior heavyweight — a boxer weighing up to 190 pounds (85.5 kg), between light heavyweight and heavyweight.
- king of the castle — most powerful figure
- king-of-the-salmon — a ribbonfish, Trachypterus altivelis, of northern parts of the Pacific Ocean.
- knight of the bath — a member of a knightly order founded by George I of England in 1725.
- knight of the road — a tramp
- knights of pythias — a fraternal order founded in Washington, D.C., in 1864.
- lactogenic hormone — prolactin.
- lake pontchartrain — a shallow lagoon in SE Louisiana, linked with the Gulf of Mexico by a narrow channel, the Rigolets: resort and fishing centre. Area: 1620 sq km (625 sq miles)
- lay it on the line — a mark or stroke long in proportion to its breadth, made with a pen, pencil, tool, etc., on a surface: a line down the middle of the page.
- lincoln's birthday — February 12, a legal holiday in some states of the U.S., in honor of the birth of Abraham Lincoln.
- literae humaniores — (at Oxford University) the faculty concerned with Greek and Latin literature, ancient history, and philosophy; classics
- magnetorheological — (physics) describing a substance whose rheological properties are modified by a magnetic field.
- make a night of it — to cause an activity to last a night
- maternity hospital — birthing facility
- median lethal dose — the quantity of a lethal substance, as a poison or pathogen, or of ionizing radiation that will kill 50 percent of the organisms subjected to it in a specified time period. Symbol: LD 5 0.
- menthol cigarettes — cigarettes that are flavoured with menthol
- merchant of venice — a comedy (1596?) by Shakespeare.
- microsoft exchange — (messaging) Microsoft's messaging and enterprise collaboration server. Exchange's primary role is as an electronic mail message store but it can also store calendars, task lists, contact details, and other data.
- minister of health — a person appointed to head the government department of health
- moccasin telegraph — the transmission of rumour or secret information; the grapevine
- monophthongization — to change into or pronounce as a monophthong.
- morphine addiction — the fact or condition of being addicted to morphine
- mount saint helens — a city in Merseyside, in NW England, near Liverpool.
- nailed to the wall — [like a trophy] Said of a bug finally eliminated after protracted, and even heroic, effort.
- natural philosophy — natural science.
- nebular hypothesis — the theory that the solar system evolved from a mass of nebular matter: prominent in the 19th century following its precise formulation by Laplace.
- negative cash flow — the situation when income is less than payments
- neighborhood watch — a neighborhood surveillance program or group in which residents keep watch over one another's houses, patrol the streets, etc., in an attempt to prevent crime.
- neo-pythagoreanism — a philosophical system, established in Alexandria and Rome in the second century b.c., consisting mainly of revived Pythagorean doctrines with elements of Platonism and Stoicism.
- nervous exhaustion — extreme mental and physical fatigue caused by excessive emotional stress; neurasthenia.
- nightmare scenario — If you describe a situation or event as a nightmare scenario, you mean that it is the worst possible thing that could happen.
- nike of samothrace — a Greek marble statue (c200 b.c.) of Nike found at Samothrace and now in the Louvre, Paris.
- no laughing matter — sth serious
- non-characteristic — Also, characteristical. pertaining to, constituting, or indicating the character or peculiar quality of a person or thing; typical; distinctive: Red and gold are the characteristic colors of autumn.
- noninterchangeable — That cannot be interchanged with another.
- north polar region — the region of land and water surrounding the North Pole.
- northeast corridor — the long, narrow strip of land between Boston, New York City, and Washington, D.C., containing many adjacent urban areas.
- not a hope in hell — If you say that someone has not got a hope in hell of doing something, you are emphasizing that they will not be able to do it.
- not a pretty sight — If you say that someone or something is not a pretty sight, you mean that it is not pleasant to look at.
- not that i know of — You say 'Not that I know of' when someone has asked you whether or not something is true and you think the answer is 'no' but you cannot be sure because you do not know all the facts.
- oath of allegiance — pledge to one's nation
- octachlorobiphenyl — (organic compound) Either of twelve isomers of the polychlorinated biphenyl containing eight chlorine atoms.
- 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.