A long, pointed stick used to prod animals. / (figuratively) That which goads or incites; a stimulus.

(pharmacology) Any of a group of antibiotics, a subclass of the ansamycins, which are synthesized either naturally by the bacterium Amycolatopsis mediterranei or artificially.

(computing) In software development, a natural language description of how an end user uses a system feature.

(medicine, obsolete) Having an excess of black bile. / Characterized by melancholy. / Ill-natured; malevolent; cantankerous.