Fossa

(fos’-ah) [fo a, a ditch]. A depre ion or pit. F., Canine, a depre ion on the external surface of the superior maxilla, above and to the outer side of the socket of the canine tooth. F., Cranial, any of the three depre ions in the base of the skull for the reception of the lobes of the brain. F., Digastric, adeep groove on the inner aspect of the mastoid proce . F., Digital, a depre ion at the base of the inner surface of the great trochanter of the femur. F., Glenoid, the fo a in the temporal bone that receives the condyle of the lower jaw. F., Hyaloid, a depre ion in the anterior surface of the vitreous body for the crystalline lens. F., Iliac, the smooth internal surface of the ilium. F., Ischiorectal, the depre ion on either side of the anus, bounded on the outer side by the tuberosity of the ischium. F., Lacrymal, the depre ion in the orbital plate of the frontal bone for the reception of the lacrymal gland. F. navicular is, the dilated portion of the urethra in the glans penis. In the vulva, the depre ion between the posterior commi ure and the fourchet. F. oval is, an oval depre ion in the right auricle of the heart. F. patellar is. See F., Hyaloid. F., Pituitary, a depre ion in the sphenoid bone lodging the pituitary7 body. F., Sublingual, a depre ion on the internal surface of the inferior maxillary bone, for containing the sublingual gland. F., Submaxillary, the oblong depre ion on the internal surface of the inferior maxillary bone, containing the submaxillary gland. Fourchet, or 284