Definition of frenching in US English:

frenching

noun

North American
  • A symptom of various (chiefly fungal) plant diseases, especially affecting cotton and tobacco, in which the leaves become discoloured and in some cases distorted.

Origin

Mid 19th century; earliest use found in De Bow's Review. From French + -ing.

Pronunciation

frenching

/ˈfrɛn(t)ʃɪŋ/