Maseter or Masseter: How To spell?
The word Maseter is misspelled against Masseter, a noun meaning "The large muscle which raises the under jaw, and assists in mastication."
Masseter has double "ss" is mispronounced as "s"Remember double 'SS' in between the strings ma & eter which should not be misspelled with single 'S'
Wrong Spelling:  ma-s-eter  Correct Spelling:  ma-ss-eter 
Explore spell check of Masseter to spell without errors.