- arch keystone
- замковый камень арки, свода
Англо-русский строительный словарь. 2013.
arch keystone
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Keystone — may refer to:* Keystone (architecture), the piece at the apex of an arch or vault * The Keystone effect, caused by projecting an image onto a surface at an angle, or by photography at an angle * Keystone correction for these types of… … Wikipedia
Keystone Aircraft — Corporation was an early pioneer in airplane manufacturing. Headquartered in Bristol, Pennsylvania, it was formed as Ogdensburg Aeroway Corp in 1920 by Thomas Huff and Elliot Daland, but its name was quickly changed to Huff Daland Aero Corp, then … Wikipedia
Arch — • A structure composed of separate pieces, such as stone or bricks, having the shape of truncated wedges, arranged on a curved line so as to retain their position by mutual pressure Catholic Encyclopedia. Kevin Knight. 2006. Arch Arch … Catholic encyclopedia
Keystone — Key stone , n. (Arch.) The central or topmost stone of an arch. This in some styles is made different in size from the other voussoirs, or projects, or is decorated with carving. See Illust. of {Arch}. [1913 Webster] … The Collaborative International Dictionary of English
keystone — (n.) stone in the middle of an arch, which holds up the others, 1630s, from KEY (Cf. key) (n.1) in figurative sense of that which holds together other parts + STONE (Cf. stone). Figurative sense is from 1640s. Pennsylvania was called the Keystone … Etymology dictionary
keystone — ► NOUN 1) a central stone at the summit of an arch, locking the whole together. 2) the central principle or part of a policy or system … English terms dictionary
keystone — [kē′stōn΄] n. 1. the central, topmost stone of an arch, popularly thought of as especially holding the others in place: see ARCH1 2. that one of a number of associated parts or things that supports or holds together the others; main part or… … English World dictionary
Keystone (architecture) — A keystone is the architectural piece at the crown of a vault or arch and marks its apex, locking the other pieces into position.cite book last =Ching first =Francis D.K. authorlink = coauthors = title =A Visual Dictionary of Architecture… … Wikipedia
ARCH — The arch was invented around 2500 BC in the Indus Valley of ancient India. It is a curved structure that rests on posts or walls and allows for the spanning of an architectural space. Prior to the use of the arch, the post and lintel structure … Historical Dictionary of Architecture
Keystone species — A keystone species is a species that has a disproportionate effect on its environment relative to its abundancecite journal author=Paine, R.T. year=1995 title=A Conversation on Refining the Concept of Keystone Species journal=Conservation Biology … Wikipedia
arch — arch1 /ahrch/, n. 1. Archit. a. a curved masonry construction for spanning an opening, consisting of a number of wedgelike stones, bricks, or the like, set with the narrower side toward the opening in such a way that forces on the arch are… … Universalium
