Webster's Revised Unabridged Dictionary · 1913

Wheal

Wheal , noun

[Old English whele, Anglo-Saxon hwele putrefaction, hwelian to putrefy.]

A pustule; a whelk. — Wiseman

Wheal , noun

[Compare Wale.]

1.
A more or less elongated mark raised by a stroke; also, a similar mark made by any cause; a weal; a wale.
2.
(Medicine) Specifically (Medicine), a flat, burning or itching eminence on the skin, such as is produced by a mosquito bite, or in urticaria.

Wheal , noun

[Cornish hwel.]

(Mining) A mine.