黑寡妇（Black Widow）是指蜘蛛的一种，通常是指黑色的女性。它的来源可能源于蜘蛛的一种特殊习性，即雌性蜘蛛在交配后会吃掉雄性蜘蛛。

例句：

The black widow spider is known for its deadly venom. 黑寡妇蜘蛛以其毒性致命而闻名。

She was called the Black Widow because she had married and divorced several wealthy men. 她被称为黑寡妇，因为她嫁过几个有钱的男人，后来又跟他们离婚了。