petrous
81Apex — From the Latin meaning summit, the apex is the tip of a pyramidal or rounded structure, like the lung or the heart. The apex of the lung is indeed its tip, its rounded most superior portion. The apex of the heart is likewise its tip, but that is… …
82Facies — A direct borrowing from the Latin, facies means face. * * * 1. [TA] SYN: face (1). 2. [NA] SYN: surface. 3. SYN: expression (2). [L.] acromial articular f. of clavicle SYN: acromial facet of clavicle. adenoid f. the open mouthed and often …
83Foramen — A natural opening. Although a foramen is usually through bone, it can be an opening through other types of tissue, as with the foramen ovale. * * * An aperture or perforation through a bone or a membranous structure. SYN: trema (1). [L. an… …
84Ganglion — The celebrated 2nd century Greek physician Galen ((c. 130 201 A.D.) who lived and worked in Rome first used the word ganglion to denote a nerve complex. Ganglion still is used to refer to an aggregation of nerve cell bodies. Another use of the… …
85Nerve — A bundle of fibers that uses electrical and chemical signals to transmit sensory and motor information from one body part to another. See nervous system. * * * A whitish cordlike structure composed of one or more bundles (fascicles) of myelinated …
86apicectomy — 1. Opening and exenteration of air cells in the apex of the petrous part of the temporal bone. 2. In dental surgery, an obsolete synonym for apicoectomy. [L. apex, summit or tip, + G. ektome …
87notch — 1. An indentation at the edge of any structure. 2. Any short, narrow, V shaped deviation, whether positive or negative, in a linear tracing. SYN: incisura [TA], emargination, incisure …
88opening — A gap in or entrance to an organ, tube, or cavity. SEE ALSO: aperture, fossa, ostium, orifice, pore. access o. SYN: access. aortic o. SYN: aortic hiatus …
89pars — SYN: part. [L. p. (part ) a part] p. abdominalis aortae [TA] SYN: abdominal aorta. p. abdominalis ductus thoracici [TA] SYN: abdominal part of thoracic duct. p. abdominalis esophagi [TA] SYN: abdominal part of esophagus. p. abdomina …
90petrosal — Relating to the petrosa. SYN: petrous (2). * * * pe·tro·sal pə trō səl adj of, relating to, or situated in the region of the petrous portion of the temporal bone or capsule of the inner ear petrosal n PETROSAL BONE * * * pe·tro·sal (pə… …
