ˌsiˌnekfəˈnēsə̇s, sə̇ˌn- noun
( plural synechphone·ses -ēˌsēz)
Etymology: New Latin, from Greek synekphōnēsis, from synekphōnein to utter together (from syn- + ekphōnein to utter, pronounce, from ek, ex out of, from + phōnein to speak, utter, from phōnē sound, voice) + -sis — more at ex- , ban
: contraction of two syllables into one : synizesis , syneresis