18-letter words containing p, r, o, t, l, g
- aerial photography — Aerial photography is the process of taking photographs of an area from above, for example from an airplane or mast.
- algebraic topology — the branch of mathematics that deals with the application of algebraic methods to topology, especially the study of homology and homotopy.
- alphaphotographics — A display made up of text characters combined with high-resolution photographic images (proposed as a future form of videotex).
- antiprostaglandins — Plural form of antiprostaglandin.
- arctic archipelago — group of mostly large islands in the Arctic Ocean off the N coast of Canada
- assignment problem — (mathematics, algorithm) (Or "linear assignment") Any problem involving minimising the sum of C(a, b) over a set P of pairs (a, b) where a is an element of some set A and b is an element of set B, and C is some function, under constraints such as "each element of A must appear exactly once in P" or similarly for B, or both. For example, the a's could be workers and the b's projects. The problem is "linear" because the "cost function" C() depends only on the particular pairing (a, b) and is independent of all other pairings.
- autobiographically — In a autobiographical manner.
- biological parents — the biological mother and father of a child
- biological therapy — biotherapy
- blocking capacitor — a capacitor that blocks the passage of direct current but allows alternating current to pass
- chromolithographer — One engaged in chromolithography.
- chromolithographic — Pertaining to, or made by, chromolithography.
- colour photography — the art or process of taking and developing photographs in colour
- compartmentalizing — Present participle of compartmentalize.
- complementary gene — one of a pair of genes, each from different loci, that together are required for the expression of a certain characteristic
- coupling capacitor — A coupling capacitor is a capacitor that is used to transmit an alternating current signal from one node to another.
- developing country — a nonindustrialized poor country that is seeking to develop its resources by industrialization
- diphosphoglycerate — an ester of phosphoric acid and glyceric acid that occurs in the blood and that promotes the release of hemoglobin-bound oxygen.
- electrocardiograph — A machine used for electrocardiography.
- electrophotography — Any of several methods of photocopying in which an image is created and then transferred between surfaces using static electricity.
- equinoctial spring — either of the two highest spring tides that occur at the equinoxes
- farewell-to-spring — a slender, showy plant, Clarkia amoena, of the evening primrose family, native to western North America, having satiny, cup-shaped, lilac-crimson or reddish-pink flowers and roundish fruit.
- floating partition — a partition running parallel to and between two joists and resting on blocking between them.
- free-range poultry — poultry kept in natural nonintensive conditions
- fulminating powder — powder that explodes by percussion.
- functional program — (language) A program employing the functional programming approach or written in a functional language.
- geometrical optics — the branch of optics dealing with light as rays, especially in the study of the effects of lenses and mirrors on light beams and of their combination in optical instruments.
- glomerulonephritis — a kidney disease affecting the capillaries of the glomeruli, characterized by albuminuria, edema, and hypertension.
- golden opportunity — perfect chance
- gravitational pull — force of gravity
- grease the palm of — to influence by giving money to; bribe
- helicopter gunship — military attack helicopter
- histomorphological — histology.
- houghton-le-spring — a town in N England, in Sunderland unitary authority, Tyne and Wear: coal-mining. Pop: 36 746 (2001)
- intelligence corps — a military department that gathers and analyzes information
- lithostratigraphic — Of or pertaining to lithostratigraphy.
- logarithmic spiral — log r = aθ
- long-stay car park — a car park (eg at an airport) where cars can be left for a long time
- micropalaeontology — the branch of palaeontology concerned with the study of microscopic fossils
- moccasin telegraph — the transmission of rumour or secret information; the grapevine
- morning-after pill — a contraceptive pill containing only an estrogen and used by women within a few hours after sexual intercourse.
- neuroleptanalgesia — a semiconscious nonreactive state induced by certain drug combinations, as fentanyl with droperidol.
- neuroophthalmology — the branch of ophthalmology that deals with the optic nerve and other nervous system structures involved in vision.
- neutrosophic logic — (logic) (Or "Smarandache logic") A generalisation of fuzzy logic based on Neutrosophy. A proposition is t true, i indeterminate, and f false, where t, i, and f are real values from the ranges T, I, F, with no restriction on T, I, F, or the sum n=t+i+f. Neutrosophic logic thus generalises: - intuitionistic logic, which supports incomplete theories (for 0
- nonpartisan league — a political organization of farmers, founded in North Dakota in 1915, and extending to many states west of the Mississippi, with the aim of influencing agricultural legislation in state legislatures.
- north polar region — the region of land and water surrounding the North Pole.
- occupational group — An occupational group is a category used by insurance companies to classify jobs according to how hazardous they are.
- offset lithography — offset (def 6).
- optical brightener — an additive that dyes and brightens fabric or paper
- palaeoanthropology — the branch of anthropology concerned with primitive man
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