Cetylic \Ce*tyl"ic\, a. (Chem.) Of, pertaining to, or derived from, spermaceti.

Cetylic alcohol (Chem.), a white, waxy, crystalline solid, obtained from spermaceti, and regarded as homologous with ordinary, or ethyl, alcohol; ethal; -- called also cetyl alcohol.

Source: Webster's Revised Unabridged Dictionary (1913)