1 A badge or insignia consisting of stripes meeting at an angle, worn on the sleeve of a military or police uniform to indicate rank, merit, or length of service. 2  n. Heraldry A device shaped like an inverted V.  n.
In physiology, a stimulus (plural stimuli) is a detectable change in the internal or external environment. The ability of an organism or organ to respond to external stimuli is called sensitivity.When a stimulus is applied to a sensory receptor, it normally elicits or influences a reflex via stimulus transduction.ne internal stimulus that causes hormone release is blood pressure. Hypotension, or low blood pressure, is a large driving force for the release of vasopressin, a hormone which causes the retention of water in the kidneys.
liminal stimulus A stimulus of an intensity such that it just provokes a response that is at threshold. Syn. threshold stimulus. threshold stimulus See liminal stimulus.timulus. adequate stimulus a stimulus of the specific form of energy to which a given receptor is sensitive. aversive stimulus one which, when applied following the occurrence of a response, decreases the strength of that response on later occurrences.