19-letter words containing a, d, h, o
- desargues's theorem — the theorem that if two triangles are so related that the lines joining corresponding vertices meet in a point, then the extended corresponding lines of the two triangles meet in three points, all on the same line.
- devil's coach-horse — a large black rove beetle, Ocypus olens, with large jaws and ferocious habits
- devils-on-horseback — a savoury of prunes wrapped in bacon slices and served on toast
- diethylaminoethanol — a colorless, hygroscopic, water-soluble liquid, C 6 H 15 NO, used for the synthesis of local anesthetics, in antirust compounds, and in photographic emulsions.
- digital photography — the taking or manipulation of photographs that are stored as data files on a computer.
- dimethylnitrosamine — a yellow, water-soluble carcinogenic liquid, C 2 H 6 N 2 O, found in tobacco smoke and certain foods: known to be a potent carcinogen. Abbreviation: DMN, DMNA.
- direct grant school — (in Britain, formerly) a school financed by endowment, fees, and a state grant conditional upon admittance of a percentage of nonpaying pupils nominated by the local education authority
- displaced homemaker — a woman recently divorced, separated, or widowed after many years as a homemaker.
- diversional therapy — the structured use of leisure time in recreation and play as a form of or supplement to conventional therapy
- domain architecture — (systems analysis) A generic, organisational structure or design for software systems in a domain. The domain architecture contains the designs that are intended to satisfy requirements specified in the domain model. A domain architecture can be adapted to create designs for software systems within a domain and also provides a framework for configuring assets within individual software systems.
- dominance hierarchy — a system or set of relationships in animal groups that is based on a hierarchical ranking, usually established and maintained by behavior in aggressive encounters: one or a few members hold the highest rank and the others are submissive to those ranking higher and dominant to those ranking lower.
- dominant wavelength — the wavelength of monochromatic light that would give the same visual sensation if combined in a suitable proportion with an achromatic light
- don the baggy green — to represent Australia at Test cricket
- don't do that then! — (humour) (From an old doctor's office joke about a patient with a trivial complaint) A stock response to a user complaint. "When I type control-S, the whole system comes to a halt for thirty seconds." "Well don't do that then!"
- don't make me laugh — Some people reply to other people's comments or opinions by saying 'Don't make me laugh' when they disagree with them and think they are foolish or inaccurate.
- double-helical gear — herringbone gear.
- draw in one's horns — one of the bony, permanent, hollow paired growths, often curved and pointed, that project from the upper part of the head of certain ungulate mammals, as cattle, sheep, goats, or antelopes.
- draw the color line — to impose or accept the color line
- draw the curtain on — to end
- drink the health of — to salute or celebrate with a toast
- dry-bulk cargo ship — a ship that carries an unpackaged dry cargo such as coal or grain; bulk carrier
- early purple orchid — a Eurasian orchid, Orchis mascula, with purplish-crimson flowers and stems marked with blackish-purple spots
- east dunbartonshire — a council area of central Scotland to the N of Glasgow: part of Strathclyde region from 1975 until 1996: mainly agricultural and residential. Administrative centre: Kirkintilloch. Pop: 106 970 (2003 est). Area: 172 sq km (66 sq miles)
- electrocardiographs — Plural form of electrocardiograph.
- electrocardiography — The measurement of electrical activity in the heart and the recording of such activity as a visual trace (on paper or on an oscilloscope screen), using electrodes placed on the skin of the limbs and chest.
- electrohydrodynamic — (physics) Of or pertaining to electrohydrodynamics.
- euclidean algorithm — Euclid's Algorithm
- fashion coordinator — a person in a department store or other establishment who coordinates activities centered upon or related to fashion, as fashion themes, shows, displays, and promotion.
- feather-duster worm — any tube-dwelling polychaete worm of the families Sabellidae and Serpulidae, the numerous species having a crown of feathery tentacles used in feeding and respiration.
- fernando de noronha — an island in the S Atlantic, about 125 miles (200 km) E of easternmost tip of Brazil: a Brazilian penal colony. 10 sq. mi. (26 sq. km).
- five o'clock shadow — the rather dark stubble that appears on a man's face some hours after shaving, typically in the late afternoon if he shaved in the morning.
- five-o'clock shadow — the rather dark stubble that appears on a man's face some hours after shaving, typically in the late afternoon if he shaved in the morning.
- fluophosphoric acid — fluorophosphoric acid.
- fluoride toothpaste — toothpaste containing a small amount of fluoride as protection against tooth decay
- free alongside ship — (of a shipment of goods) delivered to the dock without charge to the buyer, but excluding the cost of loading onto the vessel
- freedom of the seas — the doctrine that ships of neutral countries may sail anywhere on the high seas without interference by warring powers.
- geothermal gradient — the increase in temperature with increasing depth within the earth.
- go under the hammer — to be offered for sale by an auctioneer
- goldbach conjecture — an unproved theorem that every even integer greater than 2 can be written as the sum of two prime numbers.
- grand duke nicholas — of Cusa [kyoo-zuh] /ˈkyu zə/ (Show IPA), 1401–1464, German cardinal, mathematician, and philosopher. German Nikolaus von Cusa.
- grandfather's clock — a pendulum floor clock having a case as tall as or taller than a person; tall-case clock; long-case clock.
- grandmother's clock — a pendulum clock similar to a grandfather's clock but shorter.
- great idaean mother — Cybele.
- handlebar moustache — a man's moustache having long, curved ends that resemble the handlebars of a bicycle.
- hanging indentation — a style of text-setting in which the first line of a paragraph is set to the full measure and subsequent lines are indented at the left-hand side
- harmonic distortion — distortion caused by nonlinear characteristics of electronic apparatus, esp of audio amplifiers, that generate unwanted harmonics of the input frequencies
- hatfield-mccoy feud — a blood feud between two mountain clans on the West Virginia–Kentucky border, the Hatfields of West Virginia and the McCoys of Kentucky, that grew out of their being on opposite sides during the Civil War and was especially violent during 1880–90.
- have a good mind to — (in a human or other conscious being) the element, part, substance, or process that reasons, thinks, feels, wills, perceives, judges, etc.: the processes of the human mind.
- have an ax to grind — an instrument with a bladed head on a handle or helve, used for hewing, cleaving, chopping, etc.
- have designs on sth — If someone has designs on something, they want it and are planning to get it, often in a dishonest way.