Armonica Glasses as Bells
Each glass armonica glass is essentially a bell, except that it is excited by the the 'catch/slip' effect of a moist finger instead of a clapper (inside) or hammer (outside). This 'catch/slip' effect is also how a violin bow works on a violin.
By the way, speed of rotation does not change a glass's pitch. Each glass has a given resonant frequency and that's that. (Although practice is required to primarily excite the fundamental instead of primarily exciting higher partials — an unpleasant sound which I call a 'wolf' or 'wolf tone' as it is reminiscent of howling.)
When talking about the anatomy of armonicaglasses, we may as well use existing bell terminology:
For more about the physics of regular (metal) bells, see this article.