entasis
Concise Oxford English Dictionary © 2008 Oxford University Press:
entasis /ˈɛntəsɪs/
▶noun (pl. entases) Architecture a slight convex curve in the shaft of a column, introduced to correct the visual illusion of concavity produced by a straight shaft.
– origin C17: mod. L., from Gk, from enteinein ‘to stretch or strain’.
'entasis' also found in these Oxford entries:
