alternative definition added over 7 years ago by Istvan Miko
The first or anteriormost of the three main body regions of an insect, which bears the
mouthparts and major sense organs.
Reference: Gibson , G. A. P., J. D. Read , and R. Fairchild. 1998. Chalcid wasps (Chalcidoidea): illustrated glossary of positional and morphological terms ..
Cross reference: None provided.