If I remember rightly, this word is used in Dracula in the context of wax dripping down a candle.

Sper`ma*ce”ti\, n. [L. sperma sperm + cetus,gen. ceti, any large sea animal, a whale, Gr. ???. See Sperm, Cetaceous.] A white waxy substance obtained from cavities in the head of the sperm whale, and used making candles, oilments, cosmetics, etc. It consists essentially of ethereal salts of palmitic acid with ethal and other hydrocarbon bases. The substance of spermaceti after the removal of certain impurities is sometimes called cetin.

Source: Webster’s Revised Unabridged Dictionary quoted on Dictionary.com.