What is the accented syllable in following word aphthous stomatitis?

Here's why:

* Aphthous is a medical term referring to a type of ulcer. The emphasis falls on the second syllable, "thous."

* Stomatitis refers to inflammation of the mouth. The emphasis falls on the second syllable, "ti."

While both words have two syllables, the emphasis is on the second syllable of each, making the pronunciation "AF-thous sto-ma-TI-tis."