The term BLACK WIDOW is a 5-letter crossword solution for the phrase 'BLACK Spider'. It is a reference to the species of spider known as Latrodectus, which is commonly referred to as the BLACK WIDOW. This species of spider is found in many parts of the world and is known for its distinctive BLACK color and red hourglass marking on its abdomen. The female of the species is particularly dangerous, as it is known to bite humans and inject venom that can cause severe pain and even death.