Definition of pour-on in English:

pour-on

adjective

  • Of, designating, or involving a substance designed to be poured on to or over something, especially a parasiticide or insecticide designed to be poured on to an animal's body.

noun

  • A pour-on substance, especially a parasiticide or insecticide.

Origin

1960s; earliest use found in Journal of Economic Entomology. From to pour on.

Pronunciation

pour-on

/ˈpɔːrɒn/