Singultus. Continued hiccough.
Sinus. An elongated cavity or abscess, having a small orifice.
Situ. Situation.
Slough. A dead or mortified portion.
Solution. The preparation made by dissolving a solid in a liquid.
Speculum. An instrument for dilating a passage or facilitating an examination.
Sphincter. A circular muscle for contracting a natural opening.
Spinal Cord. A continuation of the brain through the vertebral column.
Sporadic. Occurring singly or scattered.
Stercoraceous. Mixed with fæcal matter.