18-letter words containing d, n, r

nominative-address — a noun naming the person to whom one is speaking.
non-correspondence — communication by exchange of letters.
non-discriminative — constituting a particular quality, trait, or difference; characteristic; notable.
non-understandable — capable of being understood; comprehensible.
nondestructiveness — The quality of not being destructive.
nonionic detergent — a detergent that is polar but does not ionize in aqueous solution.
nonstriated muscle — smooth muscle
nord-pas-de-calais — a region of N France, on the Straits of Dover (the Pas de Calais): coal-mining, textile, and metallurgical industries
normally aspirated — A normally aspirated or naturally aspirated engine breathes air at atmospheric pressure.
north bedfordshire — a city in Bedfordshire, in central England.
northeast corridor — the long, narrow strip of land between Boston, New York City, and Washington, D.C., containing many adjacent urban areas.
norwegian elkhound — one of a breed of dogs having a short, compact body, short, pointed ears, and a thick, gray coat, raised originally in Norway for hunting elk and other game.
not breathe a word — to take air, oxygen, etc., into the lungs and expel it; inhale and exhale; respire.
nueva san salvador — Santa Tecla.
numerical identity — the relation that holds between two relata when they are the selfsame entity, that is, when the terms designating them have the same reference
oak-leaf hydrangea — a shrub, Hydrangea quercifolia, of the southeastern U.S., having lobed leaves and pyramidal clusters of white flowers.
obedience training — the training of an animal, especially a dog, to obey certain commands.
office of readings — the first of the canonical hours; matins
old low franconian — a Low German dialect of the Franks of the lower Rhine valley before c1100.
on delicate ground — in a situation requiring tact
on the credit side — You say on the credit side in order to introduce one or more good things about a situation or person, usually when you have already mentioned the bad things about them.
on the danger list — critically ill in hospital
on the ragged edge — precariously close to loss of self-control, mental stability, etc.
one's heart bleeds — used to express sympathetic grief, but often used ironically
open pandora's box — If someone or something opens Pandora's box or opens a Pandora's box, they do something that causes a lot of problems to appear that did not exist or were not known about before.
operation overlord — the codename for the Allied invasion (June 1944) of northern France
optical soundtrack — the final soundtrack on a motion picture, which appears as a band of black and white serrations along a strip of film to the left of the composite print. Light is shined through the serrations and is converted to audible sound.
order of magnitude — You can use order of magnitude when you are giving an approximate idea of the amount or importance of something.
organic solidarity — social cohesiveness that is based on division of labor and interdependence and is characteristic of complex, industrial societies.
organized religion — institutionalized religion, usually with a hierarchical clergy and rules to govern the means by which adherents participate
oriental almandine — a variety of corundum resembling almandine in colour and used as a gemstone
orthotungstic acid — an oxyacid acid of tungsten. Formula: H2WO4
osteitis deformans — Paget's disease.
osteoradionecrosis — bone tissue death induced by radiation.
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.
overdraft interest — interest charged on money withdrawn in excess of the credit balance of a bank or building society account
overidentification — an act or instance of identifying; the state of being identified.
paediatric nursing — the branch of nursing concerned with the care of children
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.
palm beach gardens — a city in SE Florida, near North Palm Beach.
paper handkerchief — a handkerchief made from tissue paper
parallel reduction — A form of applicative order reduction in which all redexes in an expression are reduced simultaneously. Variants include parallel outermost reduction and lenient reduction. See normal order reduction.
parathyroid glands — any of several small oval glands usually lying near or embedded in the thyroid gland.
paraurethral gland — any of a group of vestigial glands located in the posterior wall of the urethra in women.
pass the hat round — to collect money, as for a cause
passing-out parade — a ceremonial parade of cadets who have completed their training
pci mezzanine card — (hardware) (PMC) A family of low profile mezzanine cards for VMEbus, Futurebus+, desktop computers and other computer systems with logical and electrical layers based on the Peripheral Component Interconnect (PCI) specification. PMC is defined in IEEE P1386.1 and follows the Common Mezzanine Card (CMC) mechanical specification. PCI2.0 defines a 4.2 inch by 12.3 inch board that plugs perpendicularly into a mother board.
pectoral sandpiper — an American sandpiper, Calidris melanotos, the male of which, when courting, inflates its chest conspicuously.
pedestrian traffic — the people coming and going on foot in a street, town, etc
perceptual defence — the process by which it is thought that certain stimuli are either not perceived or are distorted due to their offensive, unpleasant, or threatening nature

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