"having two heads on one body," 1808, from Latinized form of Greek dikephalos "two-headed," from di- "two" (see di- (1)) + Latinized adjectival form of Greek kephalē "head" (see cephalo-).
Entries linking to dicephalous
di- 1
word-forming element of Greek origin meaning "two, double, twice, twofold," from Greek di-, shortened form of dis "twice," which is related to duo "two" and cognate with bi-, from PIE root *dwo- "two." In chemistry it indicates a compound containing two units of the element or radical to which it is prefixed.
cephalo-
before vowels, cephal-, word-forming element meaning "head, skull, brain," Modern Latin combining form of Greek kephalē "head, uppermost or top part, source," from PIE *ghebh-el- (source also of Tocharian spal "head;" Old High German gebal "skull;" also, via the notion of "front," Gothic gibla, Old Norse gafl "side of a facade").