21-letter words containing h, d, s
- double spanish burton — a tackle having one standing block and two running blocks, giving a mechanical advantage of five, neglecting friction.
- downhole safety valve — A downhole safety valve is a piece of safety equipment used inside a well, which isolates wellbore pressure and fluid if something bad happens.
- easier said than done — difficult to do
- eastern daylight time — a time zone applicable to many eastern areas of the United States during the summer months, being a daylight-saving variant of Eastern Standard Time
- embarras de richesses — a superfluous abundance of options, from which one finds it difficult to select
- epidemic encephalitis — any type of widespread encephalitis caused by various viruses
- every dog has his day — one's luck will come
- flip someone the bird — give someone the finger (see phrase under finger)
- fluorophosphoric acid — any of three acids containing fluorine and phosphorus, HPF 6 , HPO 2 F 2 , or H 2 PO 3 F.
- foot-in-mouth disease — the habit of making inappropriate, insensitive, or imprudent statements.
- french fried potatoes — a more formal name for chips
- friends with benefits — friends who have a casual sexual relationship with no expectation of commitment
- from dan to beersheba — from one end of Israel to the other: Judg. 20:1
- fuming sulphuric acid — a mixture of pyrosulphuric acid, H2S2O7, and other condensed acids, made by dissolving sulphur trioxide in concentrated sulphuric acid
- get down on something — to procure something, esp in advance of needs or in anticipation of someone else
- get/have the goods on — If you get the goods or have the goods on someone, you have evidence that they have done something wrong or criminal.
- give a horse its head — to allow a horse to gallop by lengthening the reins
- give sb the runaround — If someone gives you the runaround, they deliberately do not give you all the information or help that you want, and send you to another person or place to get it.
- give someone his head — to allow a person greater freedom or responsibility
- give someone the bird — to tell someone rudely to depart; scoff at; hiss
- goldbach's conjecture — the conjecture that every even number greater than two is the sum of two prime numbers
- got what one deserved — If you say that someone got what they deserved, you mean that they deserved the bad thing that happened to them, and you have no sympathy for them.
- guaranteed scheduling — (algorithm) A scheduling algorithm used in multitasking operating systems that guarantees fairness by monitoring the amount of CPU time spent by each user and allocating resources accordingly.
- have heard sth before — If you say that you have heard something before, you mean that you are not interested in it, or do not believe it, or are not surprised about it, because you already know about it or have experienced it.
- have one's cards read — If you have your cards read, you have your fortune told by someone who uses playing cards or tarot cards to tell you about yourself and predict your future.
- have one's hands full — the terminal, prehensile part of the upper limb in humans and other primates, consisting of the wrist, metacarpal area, fingers, and thumb.
- have one's hands tied — the terminal, prehensile part of the upper limb in humans and other primates, consisting of the wrist, metacarpal area, fingers, and thumb.
- have the inside track — If you say that someone has the inside track, you mean that they have an advantage, for example special knowledge about something.
- hierarchical database — (database) A kind of database management system that links records together like a family tree such that each record type has only one owner, e.g. an order is owned by only one customer. Hierarchical structures were widely used in the first mainframe database management systems. However, due to their restrictions, they often cannot be used to relate structures that exist in the real world.
- hindu-arabic numerals — Arabic numeral.
- hop, skip, and a jump — a short distance: The laundry is just a hop, skip, and a jump away.
- horns and halo effect — a tendency to allow one's judgement of another person, esp in a job interview, to be unduly influenced by an unfavourable (horns) or favourable (halo) first impression based on appearances
- host command facility — (operating system) (HCF) Used to access IBM S/36 and AS/400 computers from a mainframe.
- hyperkinetic disorder — another name for attention deficit hyperactivity disorder (ADHD)
- indicated horse-power — the horsepower of a reciprocating engine as shown by an indicator record. Abbreviation: ihp, IHP.
- industrial psychology — the application of psychological principles and techniques to business and industrial problems, as in the selection of personnel or development of training programs.
- japanese stranglehold — a wrestling hold in which an opponent's wrists are pulled to cross his or her arms in front of his or her own neck and exert pressure on the windpipe
- jewish defense league — an organization of militant Jewish activists, founded in 1968 in the U.S. to combat anti-Semitism and defend Jewish interests worldwide. Abbr.: JDL.
- joseph-marie jacquard — (person) /zhoh-zef' mah-ree' zhah-kar'/ (1752-07-07 to 1834-08-07) The inventor of the Jacquard loom.
- just a bunch of disks — (jargon, storage) (JBOD, or "Just a Bunch of Drives") A storage subsystems using multiple independent disk drives, as opposed to one form of RAID or another. For example, Unisys open storage provides JBOD in both SCSI and fibre channel interfaces.
- lactate dehydrogenase — an enzyme that catalyzes the interconversion of pyruvate and lactate, an important step in carbohydrate metabolism: elevated serum levels indicate injury to kidney, skeletal muscle, or heart muscle. Abbreviation: LDH.
- lady macbeth strategy — a strategy in a takeover battle in which a third party makes a bid acceptable to the target company, appearing to act as a white knight but subsequently joining forces with the original (unwelcome) bidder
- lady murasaki shikibu — Lady, 978?–1031? Japanese poet and novelist.
- lady of the camellias — French La Dame aux Camélias. a novel (1848) and play (1852) by Alexandre Dumas fils.
- lap and shoulder belt — a car seat belt
- law of thermodynamics — any of three principles variously stated in equivalent forms, being the principle that the change of energy of a thermodynamic system is equal to the heat transferred minus the work done (first law of thermodynamics) the principle that no cyclic process is possible in which heat is absorbed from a reservoir at a single temperature and converted completely into mechanical work (second law of thermodynamics) and the principle that it is impossible to reduce the temperature of a system to absolute zero in a finite number of operations (third law of thermodynamics)
- lordship of the isles — an overlordship of the Western Isles of Scotland and adjacent lands instituted in 1266 when Magnus of Norway ceded the Hebrides, the Isle of Man, and Kintyre to the King of Scotland, and claimed by the chiefs of Clan Dougall and later by those of Clan Donald. The title was forfeited to James IV in 1493 and is now held by the eldest son of the sovereign
- lost in the underflow — (jargon) Too small to be worth considering; more specifically, small beyond the limits of accuracy or measurement. This is a reference to "floating point underflow". The Hacker's Jargon File claimed that it is also a pun on "undertow" (a kind of fast, cold current that sometimes runs just offshore and can be dangerous to swimmers). "Well, sure, photon pressure from the stadium lights alters the path of a thrown baseball, but that effect gets lost in the underflow". Compare epsilon, epsilon squared; see also overflow bit.
- lotus of the good law — Saddharma-Pundarika.
- maidenhair spleenwort — an evergreen fern, Asplenium trichomanes, abundant in woody areas of the North Temperate Zone, having thickly clustered fronds.