15-letter words containing a, p, e, r, i, n
- green sandpiper — a species of sandpiper, Tringa ochropus, with a greenish back and wings
- greenfield park — a town in S Quebec, in E Canada, near Montreal.
- group insurance — life, accident, or health insurance available to a group of persons, as the employees of a company, under a single contract, usually without regard to physical condition or age of the individuals.
- 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.
- hardy perennial — a plant that lasts three seasons or more and that can withstand freezing temperatures
- heart operation — a surgical operation performed on the heart
- hematoporphyrin — a porphyrin made by treating haemoglobin with acid, used to treat cancer in photodynamic therapy
- hepatocarcinoma — (pathology) cancer of the liver.
- hip measurement — a measurement around the hips at the level of the buttocks used in clothing and assessing general health
- hip replacement — a surgical procedure involving replacing the hip joint with an artificial implant
- holding pattern — a traffic pattern for aircraft at a specified location (holding point) where they are ordered to remain until permitted to land or proceed.
- hospital corner — a fold on a bed sheet or blanket made by tucking the foot or head of the sheet straight under the mattress with the ends protruding and then making a diagonal fold at the side corner of the sheet and tucking this under to produce a triangular corner.
- hung parliament — a parliament that does not have a party with a working majority
- hunting leopard — the cheetah.
- hurdle champion — a hurdler who has defeated all others in a competition
- hyper-emotional — pertaining to or involving emotion or the emotions.
- hyperactivation — (biology) A form of sperm motility associated with active beating of the flagellum.
- hyperactiveness — The state or quality of being hyperactive.
- hyperadrenalism — a glandular disorder caused by the overactivity of the adrenal glands and often resulting in obesity
- hyperanakinesia — abnormally active mechanical movement, especially of the stomach or intestine.
- hypercalcinuria — Condition of high levels of calcium in the urine as caused by high levels of bone resorption seen in osteoporosis or hyperthyroidism.
- hyperfunctional — of or relating to a function or functions: functional difficulties in the administration.
- hyperovarianism — precocious sexuality in girls due to abnormally heavy ovarian secretion.
- hyperpolarizing — Present participle of hyperpolarize.
- hypersalivation — the act or process of salivating.
- hyperventilated — Simple past tense and past participle of hyperventilate.
- hypochondriases — Plural form of hypochondriasis.
- hypocrystalline — (of igneous rocks) having both glass and crystalline components
- hypodorian mode — a plagal church mode represented on the white keys of a keyboard instrument by an ascending scale from A to A, with the final on D.
- hypoproteinemia — an abnormally low concentration of protein in the blood.
- identity papers — law: legal documents
- identity parade — law: police lineup
- impenetrability — the state or quality of being impenetrable.
- imperial gallon — a British gallon used in liquid and dry measurement equivalent to 1.2 U.S. gallons, or 4.54 liters.
- imperviableness — the state of being imperviable
- imponderability — The state or characteristic of being imponderable.
- importunateness — Quality of being importunate.
- impregnableness — The state of being impregnable; impregnability.
- in pari delicto — in equal fault; equally culpable or blameworthy.
- in the ballpark — a tract of land where ball games, especially baseball, are played.
- inapprehensible — That cannot be apprehended; not apprehensible to or graspable by either body or mind.
- inappropriately — not appropriate; not proper or suitable: an inappropriate dress for the occasion.
- inferior planet — either of the two planets whose orbits are inside the orbit of the earth: Venus and Mercury.
- inoperativeness — The state or condition of being inoperative; nonfunction.
- inseparableness — The quality or state of being inseparable.
- inspection arms — a position in military drill in which the missile chamber of a weapon is open for inspection.
- insuperableness — The quality of being insuperable or insurmountable; insuperability.
- insurance stamp — an insurance contribution
- intemperateness — The quality of being intemperate.
- inter-parochial — of, relating to, or financially supported by one or more church parishes: parochial churches in Great Britain.