muricide1
/ˈmjʊərɪsʌɪd/ /ˈmjɔːrɪsʌɪd/rare
noun
The action of killing rodents.
Origin
Mid 19th century (in an earlier sense). From classical Latin mūr-, mūs + -icide.
muricide2
/ˈmjʊərɪsʌɪd/ /ˈmjɔːrɪsʌɪd/Animal Behaviour
noun
The action or habit of killing mice, especially as a trait or instinct in rats.
Origin
1960s. From classical Latin mūr-, mūs + -icide. Compare muricidal and earlier muricide.