| fossa for gallbladder | A depression on the visceral surface of the liver anteriorly, between the quadrate and the right lobes, lodging the gallbladder. Synonym: fossa vesicae biliaris, gallbladder fossa. (05 Mar 2000) |
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| fossa for incus | A small depression in the lower and posterior part of the epitympanic recess that lodges the short limb of the incus. Synonym: fossa for incus, incudal fossa. (05 Mar 2000) |
| fossa glandulae lacrimalis | A hollow in the orbital plate of the frontal bone, formed by the overhanging margin and zygomatic process, lodging the lacrimal gland. Synonym: fossa glandulae lacrimalis, fossa of lacrimal gland. (05 Mar 2000) |
| fossa hyaloidea | A depression on the anterior surface of the vitreous body in which lies the lens. Synonym: fossa hyaloidea, lenticular fossa, patellar fossa of vitreous. (05 Mar 2000) |
| fossa hypophysialis | Fossa of the sphenoid bone housing the pituitary gland. See: sella turcica. Synonym: fossa hypophysialis, pituitary fossa. (05 Mar 2000) |
| fossa iliaca | The smooth inner surface of the ilium above the arcuate line, giving attachment to the iliacus muscle. Synonym: fossa iliaca. (05 Mar 2000) |
| fossa iliacosubfascialis | A peritoneal recess between the psoas muscle and the crest of the ilium. Synonym: Biesiadecki's fossa, fossa iliacosubfascialis. (05 Mar 2000) |
| fossa incisiva | The depression in the midline of the bony palate behind the central incisors into which the incisive canals open. Synonym: fossa incisiva. (05 Mar 2000) |
| fossa incudis | A small depression in the lower and posterior part of the epitympanic recess that lodges the short limb of the incus. Synonym: fossa for incus, incudal fossa. (05 Mar 2000) |
| fossa infraclavicularis | A triangular depression bounded by the clavicle and the adjacent borders of the deltoid and pectoralis major muscles. Synonym: fossa infraclavicularis, deltoideopectoral triangle, deltoideopectoral trigone, infraclavicular triangle, Mohrenheim's fossa, Mohrenheim's space, regio infraclavicularis, trigonum deltoideopectorale. (05 Mar 2000) |
| fossa infraspinata | The hollow on the dorsal aspect of the scapula inferior to the spine, giving attachment chiefly to the infraspinatus muscle. Synonym: fossa infraspinata. (05 Mar 2000) |
| fossa infratemporalis | The cavity on the side of the skull bounded laterally by the zygomatic arch and ramus of the mandible, medially by the lateral pterygoid plate, anteriorly by the zygomatic process of the maxilla, posteriorly by the articular tubercle of the temporal bone and the posterior border of the lateral pterygoid plate, and above by the squama of the temporal bone and the infratemporal crest on the greater wing of the sphenoid bone. Synonym: fossa infratemporalis, zygomatic fossa. (05 Mar 2000) |
| fossa inguinalis lateralis | A depression on the peritoneal surface of the anterior abdominal wall lateral to the ridge formed by the inferior epigastric artery; it corresponds to the position of the deep inguinal ring, and is the site of an indirect inguinal hernia. Synonym: fossa inguinalis lateralis. (05 Mar 2000) |
| fossa inguinalis medialis | A depression on the peritoneal surface of the anterior abdominal wall between the ridges formed by the inferior epigastric artery and the medial umbilical ligament; it corresponds to the position of the superficial inguinal ring and is the site of a direct inguinal hernia. Synonym: fossa inguinalis medialis, fovea inguinalis interna. (05 Mar 2000) |
| fossa innominata | A shallow depression between the false vocal cord and the aryepiglottic fold on either side. Synonym: fossa innominata. (05 Mar 2000) |