Definition of frounce in English:

frounce

noun

mass noun
  • A form of trichomoniasis affecting hawks, resulting in a sore with a cheesy secretion in the mouth or throat.

    • ‘Raptors may become infected by eating infected birds and in raptors, the disease is often called frounce.’
    • ‘The former also produce the disease known as canker in pigeons, or frounce in birds of prey, and are treated with anti-protozoal drugs.’
    • ‘Frounce is caused by a protozoan called Trichomonas which is frequently present in the crops of pigeons.’

Origin

Late Middle English: of unknown origin.

Pronunciation

frounce

/fraʊns/