Noun
lunarium
A mechanical model illustrating the motion of the Moon around the Earth.
A model that only includes the Earth, the Moon and the Sun is called a tellurion or tellurium, and one which only includes the Earth and the Moon is a lunarium. Source: Internet
The manufacture involves the cleaning, bleaching, stretching on a frame (a "herse"), and scraping of the skin with a crescent-shaped knife (a "lunarium" or "lunellum"). Source: Internet
The maker then uses a crescent shaped knife, (a "lunarium" or "lunellum"), to clean off any remaining hairs. Source: Internet