Shotty: Resembling shot or pellets of lead, shotgun pellets and, hence, hard and round. The term "shotty" was in use in the 19th century. It is now generally obsolete but it is still in medicinal usage.
Shotty is very commonly used in describing the feel of lymph nodes (the lymph glands) when they are palpated (felt) through the skin. "Shotty" lymph nodes are ones that are not only hard and round but also small and surely of no consequence.