Wiktionary
cupels
n. (plural of cupel English)
Usage examples of "cupels".
Everywhere, in the gloom, there were vats, cupels, furnaces, alembics, and matrasses of unhuman form, bulking and towering colossally to the pigmy eyes of Maal Dweb.
Through a habit of observation more or less automatic with the veteran space-pilot, he peered through the doorways of the various rooms that he passed, where the cupels and retorts of a foreign chemistry were tended by age-old colossi.