Yoga is full of specialized terminology, some of it in Sanskrit, some anatomical, and some philosophical. Although there are a lot of types of yoga (and more appearing all the time), the vocabulary generally transfers pretty well between styles. Some classes may prefer the Sanskrit names of poses while others stick to English, and, of course, there are often slight variations in what the poses are called, but words like om and namaste run through like threads connecting different evolutions of asana tradition.
However, Ashtanga Yoga, the vigorous and regimented style founded by Pattabhi Jois in the tradition of Krishnamacharya, does have a number of specialized terms that haven’t come into usage elsewhere. Read on if you want to speak Ashtanga like a pro when you head to the shala for Mysore practice (but not on moon days).