Webster's Revised Unabridged Dictionary · 1913

Hecdecane

Hecdecane , noun

[Greek {not transcribed} six + {not transcribed} ten.]

(Chemistry) A white, semisolid, spermaceti-like hydrocarbon, C16H34, of the paraffin series, found dissolved as an important ingredient of kerosene, and so called because each molecule has sixteen atoms of carbon; -- called also hexadecane.