What Is a Paronychia (Nail Infection)? An infection that develops along the edge of the fingernail or toenail is called a paronychia (pear-ah-NIK-ee-ah). It is the most common hand infection and, if left untreated, can progress to a more severe infection of the entire finger or toe.
reflex action. the involuntary functioning or movement of any organ or body part in response to a particular stimulus. The function or action occurs immediately, without the involvement of the will or consciousness. reflex action.
reÂ·flex. adj. 1. Physiology Being an involuntary action or response, such as a sneeze, blink, or hiccup. 2. Produced as an automatic response or reaction: reflex opposition to change.oun. 1. reflex-an automatic instinctive unlearned reaction to a stimulus. inborn reflex, innate reflex, instinctive reflex, physiological reaction, reflex action, reflex response, unconditioned reflex. accommodation reflex-reflex changes in the eyes that enable an object to be focused on the retina.