18-letter words containing d, y, s, a
- fragile x syndrome — a widespread form of mental retardation caused by a faulty gene on the X chromosome.
- fragile-x syndrome — an inherited condition characterized by learning disability: affected individuals have an X-chromosome that is easily damaged under certain conditions
- gas plasma display — (electronics) A type of display containing super-energised neon gas, used mostly in flat monitor and television screens. Each pixel has a transistor that controls its colour and brightness.
- gastroduodenostomy — See under gastroenterostomy.
- get one's end away — to have sexual intercourse
- gettysburg address — the notable short speech made by President Lincoln on November 19, 1863, at the dedication of the national cemetery at Gettysburg, Pa.
- grand canyon state — Arizona (used as a nickname).
- grand traverse bay — an inlet of Lake Michigan on the NW of the Lower Peninsula of Michigan.
- great sandy desert — a desert in NW Australia. About 300 miles (485 km) long; 500 miles (800 km) wide; about 160,000 sq. mi. (414,400 sq. km).
- handyman's special — fixer-upper.
- happy as a sandboy — very happy; high-spirited
- haud your wheesht! — be silent! hush!
- head disk assembly — (hardware, storage) (HDA) A sealed, high capacity mainframe hard disk with integral heads, as opposed to a removable disk.
- heteroscedasticity — (statistics) The property of a series of random variables of 'not' every variable having the same finite variance.
- heteroskedasticity — Alternative spelling of heteroscedasticity.
- hexaphosphorylated — (biochemistry) phosphorylated with six units of phosphoric acid.
- hidalgo y costilla — Miguel [mee-gel] /miˈgɛl/ (Show IPA), 1753–1811, Mexican priest, patriot, and revolutionist.
- hundred years' war — the series of wars between England and France, 1337–1453, in which England lost all its possessions in France except Calais.
- hydrofluorocarbons — Plural form of hydrofluorocarbon.
- hydroxytryptamines — Plural form of hydroxytryptamine.
- hyperaldosteronism — aldosteronism.
- hypoparathyroidism — Diminished concentration of parathyroid hormone in the blood, which causes deficiencies of calcium and phosphorus compounds in the blood and results in muscular spasms.
- hypophosphorylated — (biochemistry) phosphorylated to a less than normal extent, or less than fully.
- hyposulfurous acid — an acid, H 2 S 2 O 4 , next in a series below sulfurous acid, known only in solution or in the form of its salts.
- indiscriminatingly — In an indiscriminating manner.
- industrial hygiene — the science that assesses, controls, and prevents occupational factors or sources of stress in the workplace that may significantly affect the health and well-being of employees or of the community in general
- infrared astronomy — the study of infrared radiation emitted by celestial objects.
- jerusalem syndrome — a delusive condition affecting some visitors to Jerusalem in which the sufferer identifies with a major figure from his or her religious background
- known lazy bastard — (abuse) (KLB) A term, used among technical support staff, for a user who repeatedly asks for help with problems whose solutions are clearly explained in the documentation, and persists in doing so after having been told to RTFM. KLBs are singled out for special treatment (i.e. ridicule), especially if they have been heard to say "It's so boring to read the manual! Why don't you just tell me?". The deepest pit in Hell is reserved for KLBs whose questions reveal total ignorance of the basic concepts (e.g., "How do I make a font in Excel?", "Where do I turn on my RAM?"), and who refuse to accept that their questions are neither simple nor well-formed.
- lay down your arms — If soldiers lay down their arms, they stop fighting and give up their weapons.
- lay one's hands on — the terminal, prehensile part of the upper limb in humans and other primates, consisting of the wrist, metacarpal area, fingers, and thumb.
- laying on of hands — Theology. a rite in which the cleric's hands are placed on the head of a person being confirmed, ordained, or the like.
- lincoln's birthday — February 12, a legal holiday in some states of the U.S., in honor of the birth of Abraham Lincoln.
- lipopolysaccharide — any of a class of polysaccharides to which lipids are attached.
- magnetogasdynamics — magnetohydrodynamics.
- metabolic syndrome — Pathology. a group of medical conditions present simultaneously in a patient, as high blood pressure, low HDL cholesterol levels, and an excess of abdominal fat, that increases a person's risk of heart disease, stroke, and diabetes. Also called insulin resistance syndrome.
- methylated spirits — ethyl alcohol denatured with methyl alcohol for the purpose of preventing its use as an alcoholic beverage.
- mobile data system — a system consisting of a client computer requesting information and a server supplying this information
- monophosphorylated — (biochemistry) phosphorylated with a single unit of phosphoric acid.
- mucopolysaccharide — (formerly) glycosaminoglycan.
- muscular dystrophy — a hereditary disease characterized by gradual wasting of the muscles with replacement by scar tissue and fat, sometimes also affecting the heart.
- mutual aid society — A mutual aid society is an organization that provides benefits or other help to its members when they are affected by things such as death, sickness, disability, old age, or unemployment.
- my lips are sealed — If you tell someone that your lips are sealed, you are promising them that you will keep a secret that they have told you.
- neuropsychodynamic — Of or pertaining to neuropsychodynamics.
- normally aspirated — A normally aspirated or naturally aspirated engine breathes air at atmospheric pressure.
- organic solidarity — social cohesiveness that is based on division of labor and interdependence and is characteristic of complex, industrial societies.
- parathyroid glands — any of several small oval glands usually lying near or embedded in the thyroid gland.
- payload specialist — an astronaut trained to handle highly complex or classified equipment carried aboard a space shuttle and to conduct experiments in space.
- pennsylvania dutch — the descendants of 17th- and 18th-century settlers in Pennsylvania from southwest Germany and Switzerland.
- people's democracy — (in Communist ideology) a country or form of government in transition from bourgeois democracy to socialism. In this stage there is more than one class, the largest being the proletariat, led by the Communist Party, which is therefore the dominant power