15-letter words containing r, h, i, n
- halting problem — The problem of determining in advance whether a particular program or algorithm will terminate or run forever. The halting problem is the canonical example of a provably unsolvable problem. Obviously any attempt to answer the question by actually executing the algorithm or simulating each step of its execution will only give an answer if the algorithm under consideration does terminate, otherwise the algorithm attempting to answer the question will itself run forever. Some special cases of the halting problem are partially solvable given sufficient resources. For example, if it is possible to record the complete state of the execution of the algorithm at each step and the current state is ever identical to some previous state then the algorithm is in a loop. This might require an arbitrary amount of storage however. Alternatively, if there are at most N possible different states then the algorithm can run for at most N steps without looping. A program analysis called termination analysis attempts to answer this question for limited kinds of input algorithm.
- hamiltonstovare — a large strong short-haired breed of hound with a black, brown, and white coat
- hang in (there) — to hold steadfast; persevere
- hanging glacier — a glacier situated on a shelf above a valley or another glacier; it may be joined to the lower level by an icefall or separate from it
- harbour station — the part of a port where boats shelter or station
- hard mint candy — a hardened mint-flavoured sweet
- hard of hearing — partially deaf
- hardy perennial — a plant that lasts three seasons or more and that can withstand freezing temperatures
- harlequin snake — the E American coral snake (Micrurus fulvius)
- harlequin table — a writing or dressing table having a central set of compartments that rise when drop leaves are raised.
- harmonic motion — periodic motion consisting of one or more vibratory motions that are symmetric about a region of equilibrium, as the motion of a vibrating string of a musical instrument.
- harmonic series — a series in which the reciprocals of the terms form an arithmetic progression.
- harun al-rashid — a.d. 764?–809, caliph of Baghdad 786–809: one of the greatest Abbasids, he was made almost a legendary hero in the Arabian Nights.
- harun ar-rashid — a.d. 764?-809; caliph of Baghdad (786-809): given popular fame as a hero of The Arabian Nights
- haute-normandie — a region of NW France, on the English Channel: generally fertile and flat
- haversian canal — a microscopic channel in bone, through which a blood vessel runs.
- hawaiian guitar — a six-to-eight-string electric guitar, fretted with a piece of metal or bone to produce a whining, glissando sound, played in a horizontal position usually resting on the performer's knees or on a stand, and much used by country music performers.
- hay conditioner — either of two machines, one designed to crush stems of hay, the other to break and bend them, in order to cause more rapid and even drying
- hazard analysis — risk assessment
- health minister — a government minister who is responsible for health
- hearing ear dog — a dog that has been trained to alert a hearing-impaired person to sounds, as a telephone ringing or dangerous noises.
- hearing-ear dog — a dog that has been trained to alert a hearing-impaired person to sounds, as a telephone ringing or dangerous noises.
- heart condition — cardiac disorder
- heart operation — a surgical operation performed on the heart
- heart-searching — a thorough examination of one's feelings and motives; a self-examination of one's conscience.
- heartbreakingly — causing intense anguish or sorrow.
- heavy breathing — stertorous breathing or breathing done with difficulty
- heliacal rising — rising of a celestial object at approximately the same time as the rising of the sun
- heliocentricity — measured or considered as being seen from the center of the sun.
- hemangiosarcoma — A fast-growing, highly invasive variety of cancer, a sarcoma arising from the lining of blood vessels, occurring almost exclusively in dogs and rarely in cats.
- hematoporphyrin — a porphyrin made by treating haemoglobin with acid, used to treat cancer in photodynamic therapy
- hemicraniectomy — (surgery) The surgical removal of half of the cranium to enable brain surgery; hemicraniotomy.
- henrietta maria — 1609–69, queen of England (1625–49), the wife of Charles I; daughter of Henry IV of France. Her Roman Catholicism contributed to the unpopularity of the crown in the period leading to the Civil War
- henry cavendish — Henry, 1731–1810, English chemist and physicist.
- hepatocarcinoma — (pathology) cancer of the liver.
- herbal medicine — the use of herbs to treat illness
- hereditarianism — a person who believes that differences between individuals or groups, including moral and intellectual attributes, are predominantly determined by genetic factors (opposed to environmentalist).
- hereditarianist — a person who believes in the doctrine of hereditarianism
- heritage centre — a museum that houses exhibits describing the culture and history of a particular place and its inhabitants
- hermeneutically — of or relating to hermeneutics; interpretative; explanatory.
- heroin overdose — an excessive amount of the drug heroin, sufficient to cause illness or death
- heterochromatin — the dense, highly stainable part of a chromosome.
- heterogeneities — the quality or state of being heterogeneous; composition from dissimilar parts; disparateness.
- heteronormative — noting or relating to behavior or attitudes consistent with traditional male or female gender roles and the assumption of heterosexuality as the norm: our heteronormative culture.
- hexylresorcinol — white or yellowish-white, needle-shaped crystals, C 12 H 18 O 2 , used chiefly as an antiseptic and for the expulsion of intestinal worms.
- hibernicization — the process or act of making Irish
- hiberno-english — Also called Anglo-Irish. the English language as spoken in Ireland.
- high resolution — a great amount of detail visible in a photographic, TV, or video image
- high-principled — possessing or displaying very high moral or ethical principles
- high-resolution — having or capable of producing an image characterized by fine detail: high-resolution photography; high-resolution lens.