Examples from the Web for preoral
Prostomium: The region in front of the mouth; the preoral part of the head.The Sea-beach at Ebb-tide|Augusta Foote Arnold
To the right of this adoral zone is a single line of preoral cilia.Marine Protozoa from Woods Hole|Gary N. Calkins
At the anterior end of the preoral lobe is a nervous thickening of the ectoderm called 226 the apical plate .
The cilia of the preoral and postoral bands are not clearly differentiated at this stage.