Main Entry: en·ta·sis

Pronunciation: \ˈen-tə-sis\

Function: noun

Inflected Form(s): plural en·ta·ses \-tə-ˌsēz\

Etymology: Greek, literally, distension, stretching, from enteinen to stretch tight, from en- ²en- + teinein to stretch — more at thin

Date: 1664

: a slight convexity especially in the shaft of a column