The Collaborative International Dictionary of English v.0.48:

Lipocephala \Lip`o*ceph"a*la\ (l[i^]p`[-o]*s[e^]f"[.a]*l[.a]),
   n. pl. [NL., fr. Gr. lei`pesqai to be lacking + kefalh`
   head.] (Zool.)
   Same as Lamellibranchia.
   [1913 Webster]