Category: S

To a type of placenta found in ungulates (e.g., sheep and goats) in which there is destruction of the surface layer of the uterine mucosa, thus allowing chorionic villi to come into direct contact with maternal blood vessels.  

The excision of a section of a ligament. Surgical procedure to excise a ligament.  

The condition of being bound together.  

A network of health problems, especially ones that share common social underpinnings and cause an increased public health burden on a community. An example of a syndemic is the linkage between the ready availability of snack foods, low socioeconomic status, sedentariness, overeating, obesity, and an increased risk of diabetes mellitus and coronary artery disease. The…

The excision of a circular strip of the conjunctiva around the cornea to relieve pannus. Surgical excision of a segment of the conjunctiva.  

The outer layer of cells covering the chorionic villi of the placenta. These cells are in contact with the maternal blood or decidua.  

The development of adhesions between opposing inflamed surfaces.  

Loss of consciousness that occurs only in certain distinct clinical circumstances (e.g., after urinating, coughing, or having a bowel movement). It is sometimes associated with inadequate return of blood to the right side of the heart, Valsalva maneuver, or increased parasympathetic tone.  

Loss of consciousness during diving that occurs when a diver hyperventilates and then holds his breath while swimming underwater for an extended period before resurfacing. The loss of consciousness may result in drowning or near-drowning.  

The simultaneous clonic contraction of several muscles. A shaking or rhythmic muscle contraction involving multiple muscles at the same time. A condition marked by shaking or spasms, akin to St. Vitus’s dance.