Pygophore: the large upper piece of the genitalia in Homoptera.
Pygotheca: the parts containing the genitalia in Homoptera.
Pyloric: referring to the posterior extremity of the chylific ventricle.
Pyloric valve: the specialized posterior portion of crop where there is no distinct gizzard.
Pyloric valvule: a circular projection of the stomach behind which is an enlargement of the intestine.
Pylorus: the chylific ventricle.
Pyriform: shaped like a pear.
Quadra -ri -ro: as a prefix, means four.
Quadrate: square or nearly so.