Latrodectus mactans

Definitions of Latrodectus mactans
  1. noun
    venomous New World spider; the female is black with an hourglass-shaped red mark on the underside of the abdomen
    synonyms: black widow
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    type of:
    spider
    predatory arachnid with eight legs, two poison fangs, two feelers, and usually two silk-spinning organs at the back end of the body; they spin silk to make cocoons for eggs or traps for prey
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