| tonsillar fossulae | The small pits at the openings of the tonsillar crypts onto the medial surface of the tonsil. Synonym: fossulae tonsillares. (05 Mar 2000) |
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| petrosal fossula | A small and often only faintly marked depression on the inferior surface of the petrous portion of the temporal bone, between the jugular fossa and the opening of the carotid canal; here opens the canaliculus tympanicus transmitting the tympanic nerve. Synonym: fossula petrosa, petrosal fossa, receptaculum ganglii petrosi. (05 Mar 2000) |
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| fossula | 1. A small fossa. 2. A minor fissure or slight depression on the surface of the cerebrum. Synonym: fossette. Origin: L. Dim. Of fossa, ditch (05 Mar 2000) |
| fossula fenestrae cochleae | A depression on the medial wall of the middle ear which has the fenestra cochleae (round window) in its lower portion. Synonym: fossula rotunda, little fossa of the cochlear window. (05 Mar 2000) |
| fossula fenestrae vestibuli | A depression on the medial wall of the middle ear which has the fenestra vestibulae (oval window) in its lower portion. Synonym: Huguier's sinus, little fossa of the vestibular window, little fossa of the vestibular round window. (05 Mar 2000) |
| fossula petrosa | A small and often only faintly marked depression on the inferior surface of the petrous portion of the temporal bone, between the jugular fossa and the opening of the carotid canal; here opens the canaliculus tympanicus transmitting the tympanic nerve. Synonym: fossula petrosa, petrosal fossa, receptaculum ganglii petrosi. (05 Mar 2000) |
| fossula rotunda | A depression on the medial wall of the middle ear which has the fenestra cochleae (round window) in its lower portion. Synonym: fossula rotunda, little fossa of the cochlear window. (05 Mar 2000) |
| tonsillar | Relating to a tonsil, especially the palatine tonsil. Synonym: amygdaline. (05 Mar 2000) |
| tonsillar branch of glossopharyngeal nerve | <anatomy, nerve> Branches of glossopharyngeal nerve conducting sensory fibres from the palatine tonsillar fossa. Synonym: rami tonsillares nervi glossopharyngei. (05 Mar 2000) |
| tonsillar branch of the facial artery | <anatomy, artery> Primary blood supply to palatine tonsil, with extensive anastomoses with other tonsillar arteries. Synonym: ramus tonsillaris arteriae facialis. (05 Mar 2000) |
| tonsillar calculus | A calcareous concretion in a distended tonsillar crypt. Synonym: tonsillar calculus, tonsillith. Origin: tonsillo-+ G. Lithos, stone (05 Mar 2000) |
| tonsillar crypt | One of the variable number of deep recesses that extend into the palatine and pharyngeal tonsils from the free surface where they open at the tonsillar fossa. Synonym: crypta tonsillaris. (05 Mar 2000) |
| tonsillar fossa | The depression between the palatoglossal and palatopharyngeal arches occupied by the palatine tonsil. Synonym: fossa tonsillaris, amygdaloid fossa, sinus tonsillaris. (05 Mar 2000) |
| tonsillar herniation | Herniation of the cerebellar tonsils through the foramen magnum. (05 Mar 2000) |
| tonsillar ring | The broken ring of lymphoid tissue, formed of the lingual, faucial, and pharyngeal tonsils. Synonym: Bickel's ring, tonsillar ring, Waldeyer's throat ring. (05 Mar 2000) |