21-letter words containing a, d, h, o
- denominational school — a school associated with a particular religious denomination
- diapason normal pitch — a standard of pitch in which A above middle C is established at 435 vibrations per second.
- do/did you hear (me)? — If you say 'Do you hear?' or 'Did you hear me?' to someone, you are telling them in an angry or forceful way to pay attention to what you are saying.
- 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.
- drop the handkerchief — a children's game in which all the players but one stand in a circle facing inward, while that one player stealthily drops a handkerchief behind a player in the circle who must pursue and attempt to catch the one who dropped the handkerchief before the latter reaches the vacated place.
- easier said than done — difficult to do
- enhanced oil recovery — any of several techniques that make it possible to recover more oil than can be obtained by natural pressure, such as the injection of fluid or gases into an oilfield to force more oil to the surface
- enharmonic modulation — a change of key achieved by regarding a note in one key as an equivalent note in another. Thus E flat in the key of A flat could be regarded as D sharp in the key of B major
- every dog has his day — one's luck will come
- 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.
- forward exchange rate — the exchange rate of a currency to be delivered at a later date
- frankfort on the oder — a city in NE Germany, on the Oder River.
- french fried potatoes — a more formal name for chips
- from dan to beersheba — from one end of Israel to the other: Judg. 20:1
- gamma hydroxybutyrate — a substance that occurs naturally in the brain, used medically as a sedative but also as a recreational drug and alleged aphrodisiac: known as 'liquid ecstasy' when mixed with alcohol
- gentleman of the road — a highwayman.
- 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
- go down the wrong way — (of food) to pass into the windpipe instead of the gullet
- 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.
- ground-effect machine — ACV (def 2).
- 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 advantage of — benefit from: sth extra
- hildegard (of bingen) — Saint(1098-1179); Ger. nun, composer, & mystic: her day is Sept. 17
- 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.
- hydraulic accumulator — an apparatus in which gas, usually air, is used as a cushion or shock absorber in a hydraulic system.
- hyperbolic paraboloid — a paraboloid that can be put into a position such that its sections parallel to one coordinate plane are hyperbolas, with its sections parallel to the other two coordinate planes being parabolas.
- i don't know how/what — You use I don't know in expressions which indicate criticism of someone's behaviour. For example, if you say that you do not know how someone can do something, you mean that you cannot understand or accept them doing it.
- in co-ordination with — If you do something in co-ordination with someone else, you both organize your activities so that you work together efficiently.
- 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
- jordan-holder theorem — the theorem that for any two composition series of a group, an isomorphism exists between the corresponding quotient groups of each series, taken in some specified order.
- joseph-marie jacquard — (person) /zhoh-zef' mah-ree' zhah-kar'/ (1752-07-07 to 1834-08-07) The inventor of the Jacquard loom.
- jump on the bandwagon — do sth because it is popular
- 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 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
- large hadron collider — a particle accelerator at the European Laboratory for Particle Physics near Geneva, containing a circular underground tunnel 27km (16.8 miles) in circumference, around which two streams of hadrons are sent in opposite directions before being brought together in a high-energy collision