Angina pectoris, commonly known as angina, is the sensation of chest pain, pressure, or squeezing, often due to ischemia of the heart muscle from obstruction or spasm of the coronary arteries.
Pure Culture. A pure culture is a population of cells or multicellular organisms growing in the absence of other species or types.
2. countable noun. A culture is a particular society or civilization, especially considered in relation to its beliefs, way of life, or art. ...people from different cultures. I was brought up in a culture that said you must put back into the society what you have taken out.