A substance or agent that kills ants.
From Latin 'formica' (ant) + '-cide' (to kill). This compound word literally means 'ant-killer' and was formed using the standard medical/scientific suffix for substances that destroy a particular organism.
While formicicide sounds like a serious pesticide, it's actually a rarely used formal term—most people just say 'ant poison' or 'ant killer,' showing how some perfectly logical scientific words never catch on in everyday speech.
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