concave trough

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• trough — Synonyms and related words: adit, aerospace, aerosphere, air hole, air pocket, airspace, alveolation, alveolus, amplitude, antinode, antrum, aqueduct, armpit, basin, billow, bore, bottom, bottom glade, bottoms, bowl, breakers, bump, burrow, canal …   Moby Thesaurus

• concave shape — noun a shape that curves or bends inward • Syn: ↑concavity, ↑incurvation, ↑incurvature • Derivationally related forms: ↑incurvate (for: ↑incurvation), ↑concave ( …   Useful english dictionary

• Concavity — (Roget s Thesaurus) < N PARAG:Concavity >N GRP: N 1 Sgm: N 1 concavity concavity depression dip Sgm: N 1 hollow hollow hollowness Sgm: N 1 indentation indentation intaglio cavity dent dint dimp …   English dictionary for students

• optics — /op tiks/, n. (used with a sing. v.) the branch of physical science that deals with the properties and phenomena of both visible and invisible light and with vision. [1605 15; < ML optica < Gk optiká, n. use of neut. pl. of OPTIKÓS; see OPTIC,… …   Universalium

• Geology of the Iberian Peninsula — The geology of the Iberian Peninsula consists of the study of the rock formations on the Iberian Peninsula, which includes Spain, Portugal, Andorra, and Gibraltar. The peninsula contains rocks from every age from Ediacaran to Recent, and almost… …   Wikipedia

• Southeast Asian arts — Literary, performing, and visual arts of Myanmar (Burma), Thailand, Laos, Cambodia, Vietnam, Malaysia, Singapore, and the Philippines. The classical literatures of Southeast Asia can be divided into three major regions: the Sanskrit region of… …   Universalium

• Geography of Africa — Africa is a continent comprising 61 political territories (including 53 countries), representing the largest of the great southward projections from the main mass of Earth s surface. It includes, within its remarkably regular outline, an area of… …   Wikipedia

• concavity — noun 1. a shape that curves or bends inward • Syn: ↑concave shape, ↑incurvation, ↑incurvature • Derivationally related forms: ↑incurvate (for: ↑incurvation), ↑concave …   Useful english dictionary

• Swallowing — Swallowed redirects here. For the song by Bush, see Swallowed (song). For the song by Blind Melon, see Nico (album). Gulp redirects here. For other uses, see Gulp (disambiguation). Baby swallowing Swallowing, known scientifically as deglutition,… …   Wikipedia

• Microtome — A microtome used in microscopy. A microtome (from the Greek mikros, meaning small , and temnein, meaning to cut ) is a sectioning instrument that allows for the cutting of extremely thin slices of material, known as sections. Microtomes are an… …   Wikipedia

• Dish — (d[i^]sh), n. [AS. disc, L. discus dish, disc, quoit, fr. Gr. di skos quoit, fr. dikei^n to throw. Cf. {Dais}, {Desk}, {Disc}, {Discus}.] 1. A vessel, as a platter, a plate, a bowl, used for serving up food at the table. [1913 Webster] She… …   The Collaborative International Dictionary of English