n. 1. A vessel made of a refractory substance such as graphite or porcelain, used for melting and calcining materials at high temperatures. 2. A severe test, as of belief.
n. 1. A vessel made of a refractory substance such as graphite or porcelain, used for melting and calcining materials at high temperatures. 2. A severe test, as of belief.
Andrea's Lexicon 