15-letter words containing ha
- hair specialist — an expert in the treatment and care of human hair
- hair transplant — the surgical transfer of clumps of skin with hair or of viable hair follicles from one site of the body to another, usually performed to correct baldness.
- hale and hearty — in good health
- half the battle — If you say that something is half the battle, you mean that it is the most important step towards achieving something.
- half wellington — a loose boot extending to just above the ankle and usually worn under the trousers.
- half-remembered — (of a memory, idea, etc) partially remembered or recalled
- half-round file — a file having a semicircular cross-section
- half-successful — achieving or having achieved success.
- half-understood — partially understood
- half-wave plate — a crystal thin enough to cause a phase difference of 180° between the ordinary and extraordinary rays of polarized light, thereby changing the direction of the plane of polarization.
- halfheartedness — The characteristic of being half-hearted.
- 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.
- hamamelidaceous — belonging to the Hamamelidaceae, the witch hazel family of plants.
- hamersley range — a mountain range in N Western Australia: iron-ore deposits. Highest peak: 1236 m (4056 ft)
- hamiltonstovare — a large strong short-haired breed of hound with a black, brown, and white coat
- hampstead heath — a popular recreation area near Hampstead in N London
- han unification — Han character
- hang in (there) — to hold steadfast; persevere
- hang one's head — the upper part of the body in humans, joined to the trunk by the neck, containing the brain, eyes, ears, nose, and mouth.
- hang seng index — an index of share prices based on an average of 33 stocks quoted on the Hong Kong Stock Exchange
- 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
- hanging offence — a crime that is punishable by hanging
- hapax legomenon — a word or phrase that appears only once in a manuscript, document, or particular area of literature.
- harbour station — the part of a port where boats shelter or station
- hard disk drive — (storage) (HDD) A disk drive used to read and write hard disks.
- hard mint candy — a hardened mint-flavoured sweet
- hard of hearing — partially deaf
- hard row to hoe — a number of persons or things arranged in a line, especially a straight line: a row of apple trees.
- hard-boiled egg — egg boiled until the yolk is set
- hard-luck story — a story of misfortune designed to elicit sympathy
- hard-shell clam — quahog.
- hard-shell crab — a crab, especially an edible crab, that has not recently molted and has a hard shell.
- hardhead sponge — any of several commercial sponges, as Spongia officinalis dura, of the West Indies and Central America, having a harsh, fibrous, resilient skeleton.
- hardheartedness — The state of being hardhearted.
- hardship clause — a clause in a contract which covers unforeseen events that would make it more difficult for one party to complete the contract, and in which case offers alternative terms
- hardware dealer — a person or shop who deals in metal tools and implements and mechanical equipment and components, etc
- hardy perennial — a plant that lasts three seasons or more and that can withstand freezing temperatures
- hare and hounds — an outdoor game in which certain players, the hares, start off in advance on a long run, scattering small pieces of paper, called the scent, with the other players, the hounds, following the trail so marked in an effort to catch the hares before they reach a designated point.
- 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
- has had its day — If you say that something has had its day, you mean that the period during which it was most successful or popular has now passed.
- haulage company — a firm that transports goods by lorry
- hausdorff space — a topological space in which each pair of points can be separated by two disjoint open sets containing the points.
- haute-normandie — a region of NW France, on the English Channel: generally fertile and flat
- hautes-pyrenees — a department in SW France. 1751 sq. mi. (4535 sq. km). Capital: Tarbes.
- have (down) pat — to know or have memorized thoroughly