| xiphoid process | <anatomy> Composed of cartilage at the inferior aspect of the sternal body. (27 Sep 1997) |
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| secondary process | In psychoanalysis, the mental process directly related to the learned and acquired functions of the ego and characteristic of conscious and preconscious mental activities; marked by logical thinking and by the tendency to delay gratification by regulation of the discharge of instinctual demands. Compare: primary process. (05 Mar 2000) |
| pterygoid process | A long process extending downward from the junction of the body and great wing of the sphenoid bone on either side; it is formed of two plates (lateral and medial), united anteriorly but separated below to form the pterygoid notch; the pterygoid fossa is formed by the divergence of these two plates posteriorly. Synonym: processus pterygoideus, os pterygoideum. (05 Mar 2000) |
| pterygospinous process | A sharp projection from the posterior edge of the lateral pterygoid plate of the sphenoid bone. Synonym: processus pterygospinosus, Civinini's process. (05 Mar 2000) |
| sentinel spinous process fracture | Fracture of the spinous process with undetected deeper fracture's of the vertebral arch. (05 Mar 2000) |
| pyramidal process | The portion of the palatine bone passing lateral and posterior from the angle formed by the vertical and horizontal plates. Synonym: processus pyramidalis. (05 Mar 2000) |
| sheath of styloid process | A crest of bone (edge of the tympanic portion of the temporal bone) running from the front and medial side of the mastoid process to the spine of the sphenoid; it splits to ensheath the base of the styloid process. Synonym: vagina processus styloidei, vaginal process. (05 Mar 2000) |
| sheath process of sphenoid bone | A thin lamina of bone that extends medially under the body of the sphenoid bone from the medial lamina of the pterygoid process; it articulates with the vomer and the palatine bone. Synonym: processus vaginalis ossis sphenoidalis, sheath process of sphenoid bone. (05 Mar 2000) |
| siemens-martin process | See Open-hearth process, etc, under Open. Source: Websters Dictionary (01 Mar 1998) |
| sphenoid process | The posterior and smaller of the two processes at the extremity of the vertical plate of the palatine bone; processus sphenoidalis cartilaginis septi nasi, processus posterior cartilaginis septi nasi. Synonym: processus sphenoidalis, sphenoid process. (05 Mar 2000) |
| sphenoid process of palatine bone | The posterior and smaller of the two processes at the extremity of the vertical plate of the palatine bone; processus sphenoidalis cartilaginis septi nasi, processus posterior cartilaginis septi nasi. Synonym: processus sphenoidalis, sphenoid process. (05 Mar 2000) |
| sphenoid process of septal cartilage | The tapering extension of the septal cartilage that lies between the perpendicular plate of the ethmoid and the vomer. Synonym: processus posterior cartilaginis septi nasi, processus sphenoidalis cartilaginis septi nasi, sphenoid process of septal cartilage. (05 Mar 2000) |
| spinous process | The dorsal projection from the centre of a vertebral arch. Synonym: sphenoidal spine. (05 Mar 2000) |
| spinous process of tibia | Intercondyloid eminence, an elevation on the proximal extremity of the tibia between the two articular surfaces. Synonym: eminentia intercondylaris, eminentia intercondyloidea, spinous process of tibia. (05 Mar 2000) |
| spontaneous process | <chemistry> A process that occurs without outside intervention. Spontaneity is independent of rate. To be spontaneous a process must increase the entropy of the universe. (09 Jan 1998) |