the capacity to understand a broad range of topics; "a teacher must have a breadth of knowledge of the subject"; "a man distinguished by the largeness and scope of his views"
a device for showing the operating condition of some system
a signal for attracting attention
(chemistry) a substance that changes color to indicate the presence of some ion or substance; can be used to indicate the completion of a chemical reaction or (in medicine) to test for a particular reaction
the metabolic processes whereby certain organisms obtain energy from organic molecules; processes that take place in the cells and tissues during which energy is released and carbon dioxide is produced and absorbed by the blood to be transported to the lungs
a single complete act of breathing in and out; "thirty respirations per minute"
respirator that produces alternations in air pressure in a chamber surrounding a patient's chest to force air into and out of the lungs thus providing artificial respiration
sudden expulsion of air from the lungs that clears the air passages; a common symptom of upper respiratory infection or bronchitis or pneumonia or tuberculosis
exhale abruptly, as when one has a chest cold or congestion; "The smoker coughs all day"
(usually plural) the state of having reflex spasms of the diaphragm accompanied by a rapid closure of the glottis producing an audible sound; sometimes a symptom of indigestion; "how do you cure the hiccups?"
breathe spasmodically, and make a sound; "When you have to hiccup, drink a glass of cold water"