Ectasis

• (n.) The lengthening of a syllable from short to long.
Found on http://thinkexist.com/dictionary/meaning/ectasis/

Ectasis

Ec'ta·sis noun [ Latin , from Greek ...; 'ek out + ... to stretch.] (Pros.) The lengthening of a syllable from short to long.
Found on http://www.encyclo.co.uk/webster/E/7
No exact match found