excretion
C1Formal, Scientific, Technical, Medical
Definition
Meaning
The process by which waste or unwanted substances are eliminated from an organism, especially from the blood or tissues.
The waste product that is eliminated; also, by extension, the act of discharging any substance or getting rid of something undesirable.
Linguistics
Semantic Notes
Primarily a biological/medical term. Can be used metaphorically to describe the process of eliminating anything unwanted.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage.
Connotations
Neutral in both, strictly technical/biological.
Frequency
Slightly more common in academic/medical contexts in both varieties.
Vocabulary
Collocations
Grammar
Valency Patterns
excretion of [substance]excretion by [organ/system]excretion from [source]Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “[No common idioms directly related to 'excretion']”
Usage
Context Usage
Business
Rarely used, except metaphorically in phrases like 'excretion of toxic assets'.
Academic
Common in biology, medicine, physiology, and pharmacology texts.
Everyday
Limited to discussions of health, biology, or bodily functions.
Technical
Central term in medical and life sciences.
Examples
By Part of Speech
verb
British English
- The kidneys excrete urea and other waste products.
- The drug is primarily excreted in the faeces.
American English
- The liver helps excrete toxins from the blood.
- The metabolite is excreted via the urine.
adverb
British English
- The substance is excreted rapidly.
- The toxin was excreted unchanged.
American English
- The compound is excretely eliminated.
- The waste products were excreted efficiently.
adjective
British English
- The excretory organs were examined post-mortem.
- They studied the renal excretory function.
American English
- The drug has a fast excretory pathway.
- The excretory system filters the blood.
Examples
By CEFR Level
- Our bodies get rid of waste through excretion.
- Drinking water helps with excretion.
- The main organs of excretion are the kidneys and the liver.
- Problems with excretion can make you feel ill.
- The study measured the urinary excretion of the metabolite over 24 hours.
- Impaired renal excretion can lead to a dangerous build-up of toxins.
- The pharmacodynamics of the new drug includes both hepatic metabolism and renal excretion.
- Alterations in calcium excretion are a hallmark of the disorder.
Learning
Memory Aids
Mnemonic
EX-CREATION: Think of the body creating (making) waste and then ex- (out) creting it.
Conceptual Metaphor
THE BODY IS A PROCESSING PLANT (intake, processing, waste excretion).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Do not confuse with 'экскременты' (excrements, feces). 'Excretion' is the *process*; the product is 'excrement'.
Common Mistakes
- Confusing 'excretion' (removal of waste) with 'secretion' (release of a useful substance like hormones).
Practice
Quiz
Which of the following is the BEST definition of 'excretion'?
FAQ
Frequently Asked Questions
Excretion is the removal of waste products (e.g., urine, carbon dioxide). Secretion is the release of useful substances produced by the body (e.g., hormones, enzymes, saliva).
It is a formal, clinical term. In polite everyday conversation about bodily functions, people often use euphemisms like 'going to the bathroom' or 'passing water' instead of directly referring to excretion.
Yes, but mainly in a metaphorical or analogous sense. For example, one might talk about a machine 'excreting' waste heat or a system 'excreting' bad data.
The verb is 'to excrete'. For example, 'The skin excretes sweat.'