Category: S

A fly belonging to the families Calliphoridae and Sarcophagidae.  

An unstable acidic fluoride solution, SnF2, used to prevent dental caries. It has traditionally been used in some dentifrices and has a bitter, metallic taste.  

Fluid secreted by serous membranes that reduces friction in the serous cavities (pleural, pericardial, and peritoneal).  

An S-like curve (in the left iliac fossa) of the descending colon as it joins the rectum. Former name for sigmoid colon. The section of the colon that lies between the descending colon and the rectum.  

Flatfoot in which the foot is held everted by spasmodic contraction of the peroneal muscle.  

A painful cellulitic infection of a finger caused by a species of mycoplasma, sometimes occurring in arctic hunters or fishers. It is treated with tetracycline antibiotics.  

A fibroma, often pedunculated, lying beneath the peritoneal coat of the uterus.  

A fibroma encroaching on the endometrial cavity. It may be either sessile or pedunculated.    

The fascia of the neck just inside the skin. It includes cutaneous blood vessels, nerves, lymphatics, lymph nodes, and some fat. In the front it also contains the platysmus muscle.  

A fertility awareness method by which a woman plots her daily basal body temperature, cervical mucus characteristics, and common subjective complaints associated with ovulation (e.g., mittelschmerz) on a graph to identify the days of the menstrual cycle during which there is the highest potential for conception. The validity of this method is controversial.