Definition of petty spurge in US English:

petty spurge

noun

  • A small annual euphorbia which is often a troublesome weed of cultivated ground, Euphorbia peplus, native to Europe and introduced elsewhere, especially to North America and Australia.

Origin

Late 16th century; earliest use found in Henry Lyte (1529–1607), botanist and antiquary. From petty + spurge.

Pronunciation

petty spurge

/ˈpɛtɪ spəːdʒ/