Spermaceti

sper-ma-set′i, or-sē′tī, n. a waxy matter obtained mixed with oil from the head of the sperm-whale—purified by draining off the oil and repeatedly washing with hot water and weak boiling potash-lye.— adj. derived from, or yielding, spermaceti.— n. Sperm a cet′i-whale , the sperm-whale. [L. sperm a , cētus , a whale—Gr. kētos .]