black widow: Meaning and Definition of

black' wid'ow

Pronunciation: [key]
  1. a venomous spider, Latrodectus mactans, widely distributed in the U.S., the female of which is jet-black with an hourglass-shaped red mark on the underside of its abdomen.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.