15-letter words containing a, p, t, e, r, i
- grabber pointer — (operating system) A mouse pointer sprite in the shape of a small hand that closes when a mouse button is clicked, indicating that the object on the screen under the pointer has been selected.
- 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.
- graphic granite — a pegmatite that has crystals of gray quartz imbedded in white or pink microcline in such a manner that they resemble cuneiform writing.
- grappier cement — a by-product of the calcination of hydraulic lime, having similar properties and made from ground, unslaked lumps.
- graviperception — the perception of gravity by plants
- group therapist — a psychotherapist who conducts group therapy
- hair specialist — an expert in the treatment and care of human hair
- 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).
- hematoporphyria — porphyria.
- hematoporphyrin — a porphyrin made by treating haemoglobin with acid, used to treat cancer in photodynamic therapy
- hepatocarcinoma — (pathology) cancer of the liver.
- hermaphroditism — the condition of being a hermaphrodite.
- 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
- historiographer — a historian, especially one appointed to write an official history of a group, period, or institution.
- 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.
- 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.
- 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.
- hyperactiveness — The state or quality of being hyperactive.
- hypercatabolism — an abnormally high metabolic breakdown of a substance or tissue which leads to weight loss and physical deterioration
- hypercatalectic — (of a line of verse) containing an additional syllable after the last dipody or foot. Compare acatalectic (def 2), catalectic.
- hypercritically — In a hypercritical manner.
- 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.
- 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.
- hypermutability — liable or subject to change or alteration.
- hyperparasitism — an organism that is parasitic on or in another parasite.
- hyperpotassemia — hyperkalemia.
- hyperreactivity — the quality or condition of being reactive.
- hypersalivation — the act or process of salivating.
- hyperventilated — Simple past tense and past participle of hyperventilate.
- hypocrystalline — (of igneous rocks) having both glass and crystalline components
- 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.
- imperfect stage — a phase in the life cycle of certain fungi in which either no spores or asexual spores, as conidia, are produced.
- imperial system — a system of measurement units, including the foot, pound, and second, as well as miles and yards
- imperishability — not subject to decay; indestructible; enduring.
- imponderability — The state or characteristic of being imponderable.
- importunateness — Quality of being importunate.