syn·er·e·sis also
syn·aer·e·sis 
(s
ĭ-n
ĕr
ĭ-s
ĭs)
n. pl. syn·er·e·ses (-s
ēz
′) also
syn·aer·e·ses 1. Linguistics The drawing together into one syllable of two consecutive vowels or syllables, as in the formation of a diphthong.
2. Chemistry The exudation of the liquid component of a gel, caused or accompanied by a contraction of the gel.
[Late Latin synaeresis, from Greek sunairesis, from sunairein, to contract : sun-, syn- + hairein, to take, grasp.]