22-letter words containing h, a, i, l
- delayed-action shutter — a camera shutter that opens after an interval set by the photographer
- diachronic linguistics — historical linguistics.
- diethylbarbituric acid — barbital
- dihydroxyphenylalanine — dopa.
- directed acyclic graph — (DAG) A directed graph containing no cycles. This means that if there is a route from node A to node B then there is no way back.
- directional microphone — a microphone that has a greater sensitivity to sounds coming from a particular area in front of it: used to eliminate unwanted sounds.
- dishonorable discharge — the discharge of a person from military service for an offense more serious than one for which a bad-conduct discharge is given.
- disposable soma theory — the theory that ageing is caused by the body having increasingly fewer resources to allocate towards repairing wear and damage to tissues
- double blackwall hitch — a kind of knot
- drumhead court-martial — a court-martial held, usually on a battlefield, for the summary trial of charges of offenses committed during military operations.
- duplex high speed data — (DHSD) A term which describes a full-duplex channel that can carry 64 kilobits per second. This is the kind of service provided by an Inmarsat-B type portable earth station or a leased line (not ISDN).
- educational psychology — a branch of psychology concerned with developing effective educational techniques and dealing with psychological problems in schools.
- educational technology — the use of technology, such as computers, within education, to aid the learning process
- electrophysiologically — In an electrophysiological way.
- electrothermal printer — a printer that produces characters by burning the image on specially coated paper
- english cocker spaniel — any of a breed of small spaniel, similar to and the progenitor of the cocker spaniel
- equal rights amendment — a proposed amendment to the US Constitution enshrining equality between the sexes
- evolutionary algorithm — (EA) An algorithm which incorporates aspects of natural selection or survival of the fittest. An evolutionary algorithm maintains a population of structures (usually randomly generated initially), that evolves according to rules of selection, recombination, mutation and survival, referred to as genetic operators. A shared "environment" determines the fitness or performance of each individual in the population. The fittest individuals are more likely to be selected for reproduction (retention or duplication), while recombination and mutation modify those individuals, yielding potentially superior ones. EAs are one kind of evolutionary computation and differ from genetic algorithms. A GA generates each individual from some encoded form known as a "chromosome" and it is these which are combined or mutated to breed new individuals. EAs are useful for optimisation when other techniques such as gradient descent or direct, analytical discovery are not possible. Combinatoric and real-valued function optimisation in which the optimisation surface or fitness landscape is "rugged", possessing many locally optimal solutions, are well suited for evolutionary algorithms.
- examining the entrails — The process of grovelling through a core dump or hex image in an attempt to discover the bug that brought a program or system down. The reference is to divination from the entrails of a sacrified animal. Compare runes, incantation, black art, desk check.
- fall prey to something — To fall prey to something bad means to be taken over or affected by it.
- fifth earl of rosebery — Archibald Philip Primrose [prim-rohz] /ˈprɪmˌroʊz/ (Show IPA), 5th Earl of, 1847–1929, British statesman and author: prime minister 1894–95.
- floating exchange rate — a system in which the value of a currency fluctuates against other currencies in accordance with market forces
- forth modification lab — (event) (FORML) A Forth conference held every November on the West coast of the USA ().
- full english breakfast — morning meal of eggs, bacon, etc.
- gallamine triethiodide — a neuromuscular blocking drug, C 30 H 60 I 3 N 3 O 3 , similar to curare, used as a skeletal muscle relaxant in conjunction with surgical anesthesia.
- give something a whirl — to attempt or give a trial to something
- graphical display unit — an output device incorporating a cathode ray tube on which both line drawings and text can be displayed. It is usually used in conjunction with a light pen to input or reposition data
- gravitational redshift — (in general relativity) the shift toward longer wavelengths of electromagnetic radiation emitted by a source in a gravitational field, especially at the surface of a massive star.
- great australian bight — a wide bay in S Australia.
- green around the gills — the respiratory organ of aquatic animals, as fish, that breathe oxygen dissolved in water.
- halfwave rectification — a rectifier that changes only one half of a cycle of alternating current into a pulsating, direct current.
- hammersmith and fulham — a borough of Greater London on the River Thames: established in 1965 by the amalgamation of Fulham and Hammersmith. Pop: 174 200 (2003 est). Area: 16 sq km (6 sq miles)
- handle with kid gloves — grant special treatment to
- hang out one's shingle — a thin piece of wood, slate, metal, asbestos, or the like, usually oblong, laid in overlapping rows to cover the roofs and walls of buildings.
- harvard classification — a classification of stars based on the characteristic spectral absorption lines and bands of the chemical elements present
- have a whale of a time — If you say that someone is having a whale of a time, you mean that they are enjoying themselves very much.
- heat of solidification — the heat liberated by a unit mass of liquid at its freezing point as it solidifies: equal to the heat of fusion.
- help a person off with — to assist a person in the removal of (clothes)
- hermann-mauguin symbol — a notation for indicating a particular point group.
- hexamethylenetetramine — a white, crystalline, water-soluble powder, C 6 H 12 N 4 , used as a vulcanization accelerator, an absorbent in gas masks, in the manufacture of the explosive RDX and synthetic resins, and in medicine as a diuretic and urinary antiseptic.
- historical linguistics — the study of changes in a language or group of languages over a period of time.
- historical materialism — (in Marxist theory) the doctrine that all forms of social thought, as art or philosophy, and institutions, as the family or the state, develop as a superstructure founded on an economic base; that they reflect the character of economic relations and are altered or modified as a result of class struggles; that each ruling economic class produces the class that will destroy or replace it; and that dialectical necessity requires the eventual withering away of the state and the establishment of a classless society: the body of theory, in dialectical materialism, dealing with historical process and social causation.
- holy day of obligation — a day on which Roman Catholics are duty-bound to attend Mass and abstain from certain kinds of work.
- hook, line, and sinker — a curved or angular piece of metal or other hard substance for catching, pulling, holding, or suspending something.
- horizontal application — An application program common to different business processes, e.g. office automation. Compare vertical application.
- horn-rimmed spectacles — spectacles with rims made of material resembling horn
- hospital administrator — a person who works in the management team of a hospital
- host control interface — (hardware, wireless) (HCI) A network layer in the Bluetooth Core Protocol Stack, lying between the software and the hardware stacks and serving as the interface through which the software controls two of Bluetooth's four core protocols.
- hue, saturation, value — (graphics) (HSV) A colour model that describes colours in terms of hue (or "tint"), saturation (or "shade") and value (or "tone" or "luminance").
- hydrocinnamic aldehyde — a colorless liquid, C 9 H 10 O, having a floral odor, used in perfumery and flavoring.