18-letter words containing o, n, l, a
- dead as a doornail — completely dead
- dear john (letter) — a letter from one's fiancée or girlfriend breaking off an engagement or love affair, or from one's wife asking for a divorce
- debt consolidation — the process of taking out a new loan (often secured on one's property) in order to pay off a number of existing debts
- decachlorobiphenyl — (organic compound) The fully chlorinated polychlorinated biphenyl containing ten chlorine atoms.
- declaration of war — a formal statement made by one country to another that a state of war now exists between them
- decompartmentalize — to remove excessive compartmentalization from (an organization)
- defense calculator — IBM 701
- deinstitutionalize — to discharge (a patient) as from a mental institution
- demilitarized zone — an area from which military presence or function has been removed
- departmental store — a department store.
- desalination plant — a factory where salt is removed from salt water in order to make the water suitable for drinking and irrigation
- diaminofluorescein — (organic compound) A fluorescein into which two amino groups have been substituted.
- diamondback turtle — any edible North American terrapin of the genus Malaclemys, esp M. terrapin, occurring in brackish and tidal waters and having diamond-shaped markings on the shell: family Emydidae
- dictionary catalog — a library catalog having all its entries, including authors, titles, subjects, etc., in one general alphabetical sequence.
- didaskaleinophobia — The fear of going to school.
- digital technology — the branch of scientific or engineering knowledge that deals with the creation and practical use of digital or computerized devices, methods, systems, etc.: advances in digital technology.
- digital television — a television broadcasting technology in which signals are transmitted as a sequence of binary numbers.
- dimensionalisation — Alternative spelling of dimensionalization.
- dimensionalization — The process of dimensionalizing.
- directional signal — any of four signal lights on the front left, front right, rear left, and rear right of an automotive vehicle that, when actuated by the driver, flash in pairs on the side toward which a turn is to be made.
- disability pension — a pension paid to people who are unable to continue to work because of a disability
- discourse analysis — the study of the rules or patterns characterizing units of connected speech or writing longer than a sentence.
- disproportionality — not in proportion; disproportionate.
- disproportionately — not proportionate; out of proportion, as in size or number.
- distribution class — form class
- division algorithm — the theorem that an integer can be written as the sum of the product of two integers, one a given positive integer, added to a positive integer smaller than the given positive integer. Compare Euclidean algorithm.
- division of labour — a system of organizing the manufacture of an article in a series of separate specialized operations, each of which is carried out by a different worker or group of workers
- domestic appliance — a machine used for household tasks, for example, a washing machine, refrigerator, etc.
- dominican republic — a republic in the West Indies, occupying the E part of the island of Hispaniola. 19,129 sq. mi. (49,545 sq. km). Capital: Santo Domingo.
- double achievement — a representation of the arms of a husband beside those of his wife such that a difference of rank between them is shown.
- dragline excavator — a power shovel that operates by being dragged by cables at the end of an arm or jib: used for quarrying, opencast mining, etc
- dramatic monologue — a poetic form in which a single character, addressing a silent auditor at a critical moment, reveals himself or herself and the dramatic situation.
- drinking chocolate — sweetened cocoa powder
- dry-powder inhaler — A dry-powder inhaler is a device that delivers medication to the lungs in the form of a dry powder.
- dynamic psychology — any system of psychology that emphasizes the interaction between different motives, emotions, and drives
- dynamically scoped — dynamic scope
- dysfunctionalities — Plural form of dysfunctionality.
- eastern algonquian — a subgroup of the Algonquian language family, comprising the languages spoken aboriginally from Nova Scotia to northeastern North Carolina.
- eastern meadowlark — any of several American songbirds of the genus Sturnella, of the family Icteridae, especially S. magna (eastern meadowlark) and S. neglecta (western meadowlark) having a brownish and black back and wings and a yellow breast, noted for their clear, tuneful song.
- echoencephalograph — a device that employs reflected ultrasonic waves to examine the position of brain structures.
- ecma international — (body) (Formerly European Computer Manufacturers Association) An industry association founded in 1961 and dedicated to the standardisation of information and communication systems. ECMA edits standards and technical reports. All ECMA publications are available free of charge. The best known ECMA standard is ECMA 262, defining the scripting language ECMAScript.
- economies of scale — Economies of scale are the financial advantages that a company gains when it produces large quantities of products.
- ecumenical council — a solemn assembly in the Roman Catholic Church, convoked and presided over by the pope and composed of cardinals, bishops, and certain other prelates whose decrees, when confirmed by the pope, become binding.
- eggshell porcelain — a type of very thin translucent porcelain originally made in China
- eleanor of castile — 1246–90, Spanish wife of Edward I of England. Eleanor Crosses were erected at each place at which her body rested between Nottingham, where she died, and London, where she is buried
- electric potential — the work required to transfer a unit positive electric charge from an infinite distance to a given point against an electric field
- electroacupuncture — the insertion into the body of one or more needles through which an electric current is passed
- electrocyclization — (organic chemistry) an electrocyclic reaction.
- electrodesiccation — The drying of tissue, and the prevention of bleeding, using a high-frequency electric current.
- electrodynamometer — An instrument that measures electric current by indicating the strength of repulsion or attraction between the magnetic fields of two sets of coils, one fixed and one movable.