'Ectasis' definitions:

Definition of 'ectasis'

(from WordNet)
noun
Dilatation or distension of a hollow organ [syn: ectasia, ectasis]

Definition of 'Ectasis'

From: GCIDE
  • Ectasis \Ec"ta*sis\, n. [L., fr. Gr. ?; 'ek out + ? to stretch.] (Pros.) The lengthening of a syllable from short to long. [1913 Webster]