15-letter words containing p, o, r, t, h, i
- graph reduction — A technique invented by Chris Wadsworth where an expression is represented as a directed graph (usually drawn as an inverted tree). Each node represents a function call and its subtrees represent the arguments to that function. Subtrees are replaced by the expansion or value of the expression they represent. This is repeated until the tree has been reduced to a value with no more function calls (a normal form). In contrast to string reduction, graph reduction has the advantage that common subexpressions are represented as pointers to a single instance of the expression which is only reduced once. It is the most commonly used technique for implementing lazy evaluation.
- group therapist — a psychotherapist who conducts group therapy
- 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.
- heart operation — a surgical operation performed on the heart
- height-to-paper — the standard height of type, measured from the foot to the face, in the U.S. 0.918 of an inch (2.33 cm).
- helicopter view — an overview of a situation without any details
- hematoporphyria — porphyria.
- hematoporphyrin — a porphyrin made by treating haemoglobin with acid, used to treat cancer in photodynamic therapy
- hemicryptophyte — any perennial plant that bears its overwintering buds at soil level, where they are often partly covered by surface debris
- hepatocarcinoma — (pathology) cancer of the liver.
- hermaphroditism — the condition of being a hermaphrodite.
- high priesthood — the condition or office of a high priest.
- histomorphology — histology.
- historiographer — a historian, especially one appointed to write an official history of a group, period, or institution.
- historiographic — the body of literature dealing with historical matters; histories collectively.
- 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.
- homoerotophobia — Homophobia; antipathy towards homosexuals.
- honeycomb tripe — a part of the inner lining of the stomach of the steer, calf, hog, or sheep, resembling a honeycomb in appearance and considered a table delicacy.
- 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.
- hospital doctor — a hospital doctor works in a hospital, rather than as a general practitioner, in the army, etc
- housing project — a publicly built and operated housing development, usually intended for low- or moderate-income tenants, senior citizens, etc.
- hunting leopard — the cheetah.
- huntington park — a city in SW California, near Los Angeles.
- hybrid computer — a computer system containing both analog and digital hardware.
- hydropathically — in a hydropathic manner; in a manner relating to hydropathy
- hydroxylapatite — Alternative spelling of hydroxyapatite.
- hyper-emotional — pertaining to or involving emotion or the emotions.
- hyperactivation — (biology) A form of sperm motility associated with active beating of the flagellum.
- hypercatabolism — an abnormally high metabolic breakdown of a substance or tissue which leads to weight loss and physical deterioration
- hypercorrection — the substitution, in an inappropriate context, of a pronunciation, grammatical form, or usage thought by the speaker or writer to be appropriate, resulting usually from overgeneralizing in an effort to replace seemingly incorrect forms with correct ones, as the substitution of between you and I for between you and me, by analogy with you and I as the subject of a sentence.
- hyperdemocratic — pertaining to or of the nature of democracy or a democracy.
- hyperfastidious — extremely or excessively fastidious
- hyperfunctional — of or relating to a function or functions: functional difficulties in the administration.
- hypergalactosis — an abnormally large secretion of milk.
- hyperinvolution — a decrease in the size of an organ following enlargement, usually used to describe the shrinking of the uterus after childbirth
- hypermetabolism — Biology, Physiology. the sum of the physical and chemical processes in an organism by which its material substance is produced, maintained, and destroyed, and by which energy is made available. Compare anabolism, catabolism.
- hyperpotassemia — hyperkalemia.
- hyperproduction — an increased or excessive production or output
- hypersalivation — the act or process of salivating.
- hyperthyroidism — overactivity of the thyroid gland.
- hypocortisolism — (medicine) A cortisol deficiency.
- hypocrystalline — (of igneous rocks) having both glass and crystalline components
- hypopituitarism — abnormally diminished activity of the pituitary gland, especially of the anterior lobe.
- hypoproteinemia — an abnormally low concentration of protein in the blood.
- hysteresis loop — a closed curve showing the variation of the magnetic flux density of a ferromagnetic material with the external magnetic field producing it, when this field is changed through a complete cycle
- hystricomorphic — relating to a suborder of rodents
- in short supply — If something is in short supply, there is very little of it available and it is difficult to find or obtain.
- inter-parochial — of, relating to, or financially supported by one or more church parishes: parochial churches in Great Britain.
- isopropyl ether — a colorless, volatile, flammable, slightly water-soluble liquid, C 6 H 14 O, used chiefly as a solvent for waxes, fats, and resins.
- joint ownership — sharing of property