From Longman Dictionary of Contemporary Englishexcretionex‧cre‧tion /ɪkˈskriːʃən/ noun 1 [uncountable]HBH the process of getting rid of waste material from your body2 [countable, uncountable]HBHHBA the waste material that people or animals get rid of from their bodies
Examples from the Corpus
excretion• We have recently shown that at such an excretion rate, breath exhalation is about 50-60% of the total excretion.• The use of rose bengal dye was the first attempt at assessing liver function through dye excretion.• They showed that three of the five patients had excessive faecal excretion of carbohydrate and organic acids.• Intake of diary products was less in the patients and probably contributed to the normal faecal fat excretion.• And might add thoughtfully, if excretion depends upon metabolism in the liver, I wonder what's happening there.• Most factors that normally or pathologically alter renal magnesium excretion operate in the loop of Henle.• The excretion of mercury by the kidney generally forms the basis for measurement of exposure.• These patients typically have mild renal insufficiency and diminished urate excretion due to renal tubular damage. 