15-letter words containing p, a, t, h, o, g
- 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.
- 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).
- hepaticological — of or relating to hepaticology
- histopathologic — the science dealing with the histological structure of abnormal or diseased tissue; pathological 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.
- hot-dip coating — the process of coating sheets of iron or steel with molten zinc.
- humphrey bogart — Humphrey (DeForest) ("Bogie"or"Bogey") 1899–57, U.S. motion-picture actor.
- hunting leopard — the cheetah.
- huntington park — a city in SW California, near Los Angeles.
- hyetometrograph — an instrument used to record rainfall
- hypergalactosis — an abnormally large secretion of milk.
- hypoventilating — Present participle of hypoventilate.
- immunopathology — the study of diseases having an immunologic or allergic basis.
- in a tight spot — in difficult situation
- macrophotograph — a photograph taken at very close range
- megagametophyte — the female gametophyte in seed plants.
- microangiopathy — any disease of the small blood vessels.
- microphotograph — microfilm (def 1).
- microtopography — microrelief.
- nasopharyngitis — (medicine) An inflammation of the nasal passages, and of the upper pharynx.
- neuropathologic — Of or pertaining to neuropathology.
- nonphotographic — not involving photographic equipment or techniques
- ophthalmologist — a doctor of medicine specializing in ophthalmology.
- ophthalmoplegia — Paralysis of the muscles within or surrounding the eye.
- opisthognathous — having receding jaws.
- organophosphate — Biochemistry. any of a variety of organic compounds that contain phosphorus and often have intense neurotoxic activity: originally developed as nerve gases, now widely used as insecticides and fire retardants.
- palaeontography — the branch of palaeontology concerned with the description of fossils
- palaeopathology — the study of diseases of ancient man and fossil animals
- palaeophytology — the study of ancient botany
- panoramic sight — an artillery sight that can be rotated horizontally in a full circle.
- parthenogenesis — development of an egg without fertilization.
- parthenogenetic — development of an egg without fertilization.
- patagonian hare — a burrowing, gray, long-eared and long-legged cavy of the genus Dolichotis, native to South America.
- pathophysiology — the physiology of abnormal or diseased organisms or their parts; the functional changes associated with a disease or syndrome.
- personal growth — development as an individual
- phonautographic — relating to a phonautograph or a piece of equipment that records sound visually by detecting the sound waves and indicating them on a graph
- phosphate group — the group or radical obtained by removal of one or more hydrogen atoms from phosphoric acid.
- photodegradable — (of a substance) capable of being broken down by light.
- photofluorogram — a recording on photographic film of images produced by a fluoroscopic examination.
- photoheliograph — an instrument for photographing the sun, consisting of a camera and a specially adapted telescope.
- photolithograph — Also, photolithoprint [foh-tuh-lith-uh-print] /ˌfoʊ təˈlɪθ əˌprɪnt/ (Show IPA). a lithograph printed from a stone or the like upon which a picture or design has been formed by photography.
- photomacrograph — a photograph showing a subject at actual size or somewhat larger.
- photomicrograph — a photograph taken through a microscope.
- phototelegraphy — facsimile (def 2a).
- phototopography — topographical surveying employing photogrammetric methods.
- phototypography — (formerly) the art or technique of making printing surfaces by light or photography, by any of a large number of processes.