ˈriŋə(r)z- noun
or ringer solution also ringer's fluid or ringer fluid
Usage: usually capitalized R
Etymology: after Sydney Ringer died 1910 English physician
: a balanced aqueous solution of the chlorides of sodium, potassium, and calcium, sodium bicarbonate, and sodium dihydrogen phosphate used in physiological experiments to provide a medium essentially isotonic to many animal tissues especially of poikilothermic vertebrates — compare physiological saline