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| Echinus — (Lat.) the egg-and-anchor, or egg-and-tongue ornament, very frequently carved on the ovolo in Classical architecture: the term is also applied to the ovolo moulding, but in strictness it belongs to it only when thus enriched.
| | Enchinus — The convex projecting molding of eccentric curve supporting the abacus of the Doric Capital.
| | Engaged Column — A column partially built to a wall, not freestanding and more than half protruding from the wall.
| | Entablature — (Fr. from Lat, in tabula), the superstructure which lies horizontally upon the columns in Classic architecture: it is divided into architrave, the part immediately above the column; friexe, the central space; and cornice the upper projecting mouldings, Each of the orders has its appropriate entabature, of which both the general hight and the subdivisions are regulated by a scale of proportio derived from the diameter of the column, (See Column and Order.)
|  | Entasis — The intentional slight convex curving of the vertical profile of a tapered column; used to overcome the optical illusion of concavity that characterizes straight sided columns.
| | Exedra — Or Exhedra (Gr.), (1.) The portico of the palaestra or gymnasium, in which disputations of the learned were held among the ancients: also, in private housed, the pastas, or vestibule, used for conversation. (2.) The term also signifies an apse, with ranges of seats for viewing the games in the Circus or Stadium. On the Palatine in Rome are remains of three of them, also a recess of large niche in a wall, and is sometimes applied to a porch or chapel which projects from a larger building. (3.) It is also used as synonymous with Cathedra, for a throne or seat of any kind; for a small private chamber; the space within an oriel window; and the small chapels between the buttresses of a large church or cathedral. The word, however, is not frequently met with.
| | Extrados — (Fr. from Lat. Extra, dorsum), the exterior curve of an arch, measured on the top of the voussoirs, as opposed to the soffit or intrados.
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