17-letter words containing d, t, h
- haemorrhoidectomy — surgical removal of haemorrhoids
- hairy-tailed mole — a blackish North American mole, Parascalops breweri, having a short, hairy tail.
- haitian solenodon — a rare shrewlike nocturnal mammal of the Caribbean, Solenodon paradoxus, having a long hairless tail and an elongated snout: family Solenodontidae, order Insectivora (insectivores)
- half-breadth plan — a diagrammatic plan of one half of the hull of a vessel divided lengthwise amidships, showing water lines, stations, diagonals, and bow and buttock lines.
- handicap register — a list of the disabled people in its area that a local authority had a duty to compile under the Chronically Sick and Disabled Persons Act 1970
- hanging indention — an indention of uniform length at the beginning of each line except the first, which is flush left and of full width.
- hard nut to crack — a dry fruit consisting of an edible kernel or meat enclosed in a woody or leathery shell.
- hardware platform — a group of compatible computers that can run the same software.
- hardware register — (hardware, system administration) (Or "hardware log") A list of all hardware, both internal and external, that is attached to a particular computer.
- hawking radiation — the emission of particles by a black hole. Pairs of virtual particles in the intense gravitational field around a black hole may live long enough for one to move outward when the other is pulled into the black hole, making it appear that the black hole is emitting radiation
- head of the river — any of various annual rowing regattas held on particular rivers
- heart of darkness — a short novel (1902) by Joseph Conrad.
- henry cabot lodge — Henry Cabot, 1850–1924, U.S. public servant and author: senator 1893–1924.
- heptanedioic acid — pimelic acid.
- heritage industry — an industry that manages the historical sites, buildings, and museums in a particular place, with the aim of encouraging tourism
- hermaphrodite rig — jackass rig.
- heterochlamydeous — (of a plant) having a perianth consisting of distinct sepals and petals
- high-density disk — a computer storage disk capable of holding more than 720 kilobytes of data
- hillel foundation — a national organization, founded in 1924 by the B'nai B'rith, that institutes and administers programs designed to enrich the religious, cultural, and social life of Jewish college students.
- historical method — the process of establishing general facts and principles through attention to chronology and to the evolution or historical course of what is being studied.
- hit over the head — to strike on the head
- hit the headlines — be prominently featured in the news
- hold all the aces — If you say that someone holds all the aces, you mean that they have all the advantages in a contest or situation.
- hold one's breath — If you say that someone is holding their breath, you mean that they are waiting anxiously or excitedly for something to happen.
- hold one's tongue — Anatomy. the usually movable organ in the floor of the mouth in humans and most vertebrates, functioning in eating, in tasting, and, in humans, in speaking.
- hold sb to ransom — If you say that someone is holding you to ransom in British English, or holding you for ransom in American English, you mean that they are using their power to try to force you to do something which you do not want to do.
- holding operation — a plan or procedure devised to prolong the existing situation
- holistic medicine — incorporating the concept of holism, or the idea that the whole is more than merely the sum of its parts, in theory or practice: holistic psychology.
- homeland security — national defence
- homogentisic acid — an intermediate compound in the metabolism of tyrosine and of phenylalanine, found in excess in the blood and urine of persons affected with alkaptonuria.
- hornblende schist — a variety of schist containing needles of hornblende that lie in parallel planes.
- hot-and-sour soup — a spicy Chinese soup made with pork, chicken, beans, vinegar, etc., served hot
- hotel limo driver — A hotel limo driver is the person whose job it is to drive the hotel limo.
- hottentot's bread — elephant's-foot.
- houndstooth check — a pattern of broken checks, used in woven material for jackets, shirts, etc.
- household effects — domestic belongings
- how the land lies — the prevailing conditions or state of affairs
- hundred-percenter — a completely patriotic, sometimes jingoistic person.
- hydraulic circuit — a circuit through which water or another liquid, instead of electric current, flows, but which otherwise operates in the same way as an electric circuit
- hydroelectrically — Using hydroelectric power.
- hydrogasification — a high-temperature, high-pressure process for producing liquid or gaseous fuels from fine particles of coal and hydrogen gas
- hydrotherapeutics — hydrotherapy.
- hydrotherapy pool — a pool of water used for hydrotherapy
- hydrothermal vent — an opening on the floor of the sea from which hot, mineral-rich solutions issue. Compare vent1 (def 2).
- hydroxytryptamine — (organic compound) Any hydroxy derivative of tryptamine, but especially 5-hydroxytryptamine (serotonin).
- hypsilophodontids — Plural form of hypsilophodontid.
- i'd give anything — You use give in phrases such as I'd give anything, I'd give my right arm, and what wouldn't I give to emphasize that you are very eager to do or have something.
- icositetrahedrons — Plural form of icositetrahedron.
- in broad daylight — openly, in full public view
- in the background — behind the focus of attention