piscicide1
/ˈpɪs(k)ɪsʌɪd/noun
The killing or slaughter of fish.
Origin
Mid 19th century; earliest use found in The Southern Quarterly Review. From pisci- + -cide.
piscicide2
/ˈpɪs(k)ɪsʌɪd/noun
A substance that kills fish.
Origin
1950s; earliest use found in American Anthropologist. From pisci- + -cide.