cape doctor meaning

noun (S Afr)
  A strong south-east wind in the Cape, so named because it was believed to blow away germs

Examples

1. A strong wind current, known as the Cape Doctor, brings gale force winds to the wine regions along the Cape which has the positive benefit of limiting the risk of various mildew and fungal grape disease as well as tempering humidity but can also damage grape vines that are not protected.