Holocephali \Hol`o*ceph"a*li\, n. pl. [NL., from Gr. "o`los whole + ? head.]

(Zo["o]l.) An order of elasmobranch fishes, including, among living species, only the chim[ae]ras; -- called also Holocephala. See Chim[ae]ra; also Illustration in Appendix.

Source: Webster's Revised Unabridged Dictionary (1913)