Wrong about current place for headpiece?

• The front part of the head or skull (including the forehead)

Wiktionary Word definitions in Wiktionary
n. (context chiefly anatomy English) The (l en front) part of the (l en head) or (l en skull) (as (l en distinct) from the (term occiput English)).

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
"forepart of the head," 1570s, from Latin sinciput "half a head," also "one of the smoked cheeks of a pig," from semi- (see semi- ) + caput (see capitulum . Related: Sincipital .

WordNet Word definitions in WordNet
n. the front part of the head or skull (including the forehead) [also: sincipita (pl)]

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Sinciput \Sin"ci*put\, n. [L., half a head; semihalf + caput the head.] (Anat.) The fore part of the head. (Zo["o]l.) The part of the head of a bird between the base of the bill and the vertex.