1. wheal - Noun
2. wheal - Verb
A mine.
A pustule; a whelk.
A more or less elongated mark raised by a stroke; also, a similar mark made by any cause; a weal; a wale.
Specifically (Med.), a flat, burning or itching eminence on the skin, such as is produced by a mosquito bite, or in urticaria.
Source: Webster's dictionaryMining main The Wheal Betsy engine house In former times, lead, silver, tin and copper were mined extensively on Dartmoor. Source: Internet
The word Wheal has a particular meaning in Devon and Cornwall being either a tin or a copper mine, however in the case of Wheal Betsy it was principally lead and silver which were mined. Source: Internet