A building in a nearby neighbourhood seems to be infested with mice. A TV-News reporter was interviewing one of the janitors who said: "We tried to get rid of them but I don't think we used the right insecticide". Hey, wait, mice are not insects. I don't think we could use "insecticide" here, or could we? Is there a word or compound-word for a substance that kills mice? I thought of "pesticide" but I'm not sure it works in a domestic rather than in an agricultural context.

  • 3
    Try muricide perhaps?
    – Robusto
    Aug 28, 2015 at 16:42
  • @Robusto I've found muricidal as "possessing the muricide instinct; inclined to kill mice" It seems to be the instinct to kill mice, not the product.
    – Centaurus
    Aug 28, 2015 at 16:53
  • I still think it applies. You're applying one aspect of the adverb form to the entire word.
    – Robusto
    Aug 28, 2015 at 16:55
  • @Robusto Well, if you still say so... you must be right. :-)
    – Centaurus
    Aug 28, 2015 at 16:59
  • It is the most specific term I can think of. @chasly's "rodenticide" is undoubtedly a lot more common, but includes other rodents.
    – Robusto
    Aug 28, 2015 at 17:01

2 Answers 2


Rodenticides and biocides legislation

This page explains how rodenticides (chemicals used to control rodents such as rats and mice) are affected by biocides legislation. It is intended to help suppliers wishing to market rodenticide products in the UK, and people who use rodenticides, such as pest controllers

Health and Safety Executive (UK)

Definition of RODENTICIDE

: an agent that kills, repels, or controls rodents


  • +1. It's the technical/intellectual word for "rat poison".
    – Graffito
    Aug 28, 2015 at 20:31
  • Quite so, but does rat poison work for mice? Aug 28, 2015 at 20:38
  • Rat and mice poisons are the same products. "Rat poison" has 530 000 occurences in Google, whilst "mice poison" only occurs 12 000 times.
    – Graffito
    Aug 28, 2015 at 20:46
  • This ngram is quite interesting ---> books.google.com/ngrams/… Aug 28, 2015 at 21:04
  • 2
    Actually, some rat poisons do not work on mice. The most common rat poison is one that causes rats to bleed internally. It's a relatively "safe" poison because most other animals (including people and mice) have a chemical in their bodies that blocks it's action. To make it into a mouse poison another chemical is added to block the action blocker (but this of course makes the mouse poison more hazardous).
    – Hot Licks
    Aug 28, 2015 at 22:09


  • rat poison.(Random House Dictionary)

  • rat poison, especially arsenic trioxide. (AHD)

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