The Collaborative International Dictionary of English v.0.48:
Occiput \Oc"ci*put\, n.; pl. L. Occipita, E. Occiputs. [L., fr. ob (see Ob-) + caput head. See Chief.] 1. (Anat.) The back, or posterior, part of the head or skull; the region of the occipital bone. [1913 Webster] 2. (Zool.) A plate which forms the back part of the head of insects. [1913 Webster]WordNet (r) 3.0 (2006):
occiput n 1: back part of the head or skull