Definition of nepetalactone in US English:

nepetalactone

noun

Chemistry
  • A monoterpenoid lactone containing a methylcyclopentane ring, C₁₀H₁₄O₂, which is found in some plants of the mint family (especially the catmint Nepeta cataria), and has a scent that is strongly attractive to many cats and repellent to many insects.

Origin

1940s. From nepeta + lactone.

Pronunciation

nepetalactone

/nɪˌpiːtəˈlaktəʊn/