| spinous layer | The layer of polyhedral cells in the epidermis; shrinkage artifacts and adhesion of these cells at their desmosomal junctions gives a spiny or prickly appearance. Synonym: prickle cell layer, spinous layer. (05 Mar 2000) |
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| 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) |
| spinster | 1. A woman who spins, or whose occupation is to spin. "She spake to spinster to spin it out." (Piers Plowman) "The spinsters and the knitters in the sun." (Shak) 2. A man who spins. 3. An unmarried or single woman; used in legal proceedings as a title, or addition to the surname. "If a gentlewoman be termed a spinster, she may abate the writ." (Coke) 4. A woman of evil life and character; so called from being forced to spin in a house of correction. Origin: Spin + -ster. Source: Websters Dictionary (01 Mar 1998) |
| spinstress | A woman who spins. Source: Websters Dictionary (01 Mar 1998) |
| spintharicon | A spark chamber device used to record the distribution of low energy emissions from radiopharmaceuticals administered internally, especially for thyroid scans using iodine-125. Origin: G. Spinther, spark (05 Mar 2000) |
| spinthariscope | Synonym: scintillation counter. Origin: G. Spinther, spark, + skopeo, to view (05 Mar 2000) |
| spinulescent | <botany> Having small spines; somewhat thorny. Source: Websters Dictionary (01 Mar 1998) |
| spiny | 1. Full of spines; thorny; as, a spiny tree. 2. Like a spine in shape; slender. "Spiny grasshoppers sit chirping." 3. Abounding with difficulties or annoyances. "The spiny deserts of scholastic philosophy." (Bp. Warburton) Spiny lobster. <zoology> Same as Rock lobster, under Rock. See also Lobster. Origin: From Spine. Source: Websters Dictionary (01 Mar 1998) |
| spindle |
Slender wooden, shaped cylinder, such as a newel post.
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| spina bifida |
A birth defect, also known as a neural tube defect, resulting from failure of the lower end of the neural tube to close during embryonic development. Spina bifida, the most common cause of infantile paralysis, is characterized by a lack of protection of the spinal cord by its membranes and vertebral bones.
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| spinal reflex |
The body
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| spinal shock |
A period of time after a spinal cord injury, when the area around the damaged cord is bruised and swollen. It can last for up to 6 weeks. During this time no messages can pass through the spinal cord below the level of injury. This will make the loss of function below the injury appear complete, and it is only once the swelling subsides that the true extent of the damage will become clearer.
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| spina bifida |
A condition that arises when a baby is developing, when the spinal column and spinal cord do not form properly. It can result in the child being paralysed.
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