entasis

American  

[en-tuh-sis] / ˈɛn tə sɪs /

noun

Architecture.

1. a slight convexity given to a column or tower, as to correct an optical illusion.

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entasis British  

/ ˈɛntəsɪs /

noun

1. a slightly convex curve given to the shaft of a column, pier, or similar structure, to correct the illusion of concavity produced by a straight shaft

2. Also called: entasia.  physiol an involuntary or spasmodic muscular contraction

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Etymology

Origin of entasis

1745–55; < Greek, equivalent to enta- (variant stem of enteínein to stretch tight, equivalent to en- en- ² + teínein to stretch) + -sis -sis

Example Sentences

See Examples For:

entasis

The ancient Greeks made their columns bulge out slightly about a third of the way up to correct for the optical illusion of concavity — a technique known as entasis.

From Washington Post

Sometimes they would give it, with exaggerated refinement, the entasis of the Greek column.

From The Atlantic Monthly, Volume 05, No. 27, January, 1860 by Various

The entasis of columns and curvature of what would ordinarily be straight lines is familiar to all students of architecture.

From The Brochure Series of Architectural Illustration, Volume 01, No. 08, August 1895 Fragments of Greek Detail by Various

In some early Doric temples, as the one at Assos in Asia Minor, there is no entasis.

From A History of Greek Art by Frank Bigelow Tarbell

The entasis from the temple of Mars Ultor in Rome compared with Vignola's rule for entasis.

From The Ten Books on Architecture by Vitruvius Pollio