Originally posted by: Karyudo
The other obvious pronunciation -- there are at least three of us who have to this point assumed it was "tel'-schwa-seen" -- is not explained away.

The key word here is "assumed." Those who are supporting that pronunciation have only read the term.

"Cine," as in "cine camera," has always been pronounced "sinny."

Also...

Dictionary.com: tel·e·cin·e [tel-uh-sin-ee, tel-uh-sin-ee] - link;

Merriam-Webster Online: tele·cine ['te-li-"si-nE] - link;

Hear Merriam-Webster's spoken pronunciation - here.