Jack Daniels. In a 1-oz. serving of Jack Daniels whiskey, which equates to a little less than a full shot at a respectable bar, contains about 69 calories. While that may not seem like a lot, after a couple of these bad boys mixed with cola, you've racked up quite a few calories. Jose Cuervo.
Medical Definition of black widow. : a venomous New World spider of the genus Latrodectus (L. mactans) the female of which is black with an hourglass-shaped red mark on the underside of the abdomen; broadly : any other spider of the genus Latrodectus.
Black widows are considered to be the most venomous spider in America. Black widows are black spiders usually measuring .5 inches and are identified by the red hourglass spot on their abdomen. There are several different species, such as the Lactrodectus hesperus, which is common in the western United States, and Lactrodectus mactans, which is found in most warm areas of the globe.