Sac: in Coccidae, the separate cottony envelope secreted by many species.
Saccate: gibbous or inflated toward one end.
Saccule: a little sac or pouch.
Saccus: a lobe of ventral plate of 9th segment in female Lepidoptera.
Saddle: the chitinous plate on the anal siphon of Culicid larvae.
Sagitta: arrow-like spots on the wings of Lepidoptera and other insects.
Sagittae: the inner pair of forceps in male genitalia of aculeate Hymenoptera: see stipites.
Sagittal: equivalent to longitudinal.
Sagittal plane: the longitudinal vertical plane which divides an animal into right and left halves.
Sagittate: shaped like an arrow head: elongate triangular.