👉 Hydrencephaloid refers to a type of phalangeal joint, which is a type of joint that allows for movement. The term "hydrencephaloid" comes from the Greek word "hydro" meaning water and "encephalon" referring to the brain or skull. It's also known as an orthodontic hydrencephaloid (an orthodontic hydrencephaloid) because it is used to correct tooth alignment in patients with
