Category: S

Cloth or foam overlays used to limit the inhalation of dust, fumes, or vapors by laryngectomees and to warm inhaled air.  

Passage of a tube into the stomach to obtain gastric contents for examination, for prophylaxis and treatment of ileus, to remove ingested poisons, or for feeding.  

The study of the mathematics of chemistry and chemical reactions; chemical calculations.  

To withhold from immediate use; to maintain in storage for future needs. In many countries stockpiles of food rations, medications, or vaccines are maintained by governmental agencies in anticipation of future public health needs.  

A device for assisting persons with limited function to put on socks or stockings.  

A pigmented line composed of deposits of iron on the cornea at the advancing edge of the pterygium.  

A statistical model that attempts to reproduce the sequence of events likely to occur in a real-life situation.  

The interval in an electrocardiogram that represents ventricular repolarization. An elevation of the S-T segment may be seen in myocardial infarction, Prinzmetal’s angina, and ventricular aneurysms; depression of the ST segment is seen in conditions such as coronary ischemia, left ventricular hypertrophy, and digitalis use.  

Any of the rays of the family Dasyatidae with wide pectoral fins that resemble wings. Venom glands are located in the spine running along the top of its whiplike tail; severe injuries can be inflicted if this spine penetrates the skin.  

Penetration of the skin by the spine of a stingray and injection of venom.