noun a pustule; a whelk.
2. wheal ·noun a mine.
3. wheal ·noun a more or less elongated mark raised by a stroke; also, a similar mark made by any cause; a weal; a wale.
4. wheal ·noun specifically (med.), a flat, burning or itching eminence on the skin, such as is produced by a mosquito bite, or in urticaria.