Excrete - meaning and definition. What is Excrete
Online Dictionary

What (who) is Excrete - definition

Excretory; Excreted; Excrete; Excreta; Excreting; Call of Nature; Animal excreta; Going to the bathroom; Go to the bathroom
  • White cast of uric acid defecated along with the dark feces by a [[lizard]]. Insects, birds and some other reptiles also use a similar mechanism.
  • Chemical structure of [[uric acid]].

(excretes, excreting, excreted)
When a person or animal excretes waste matter from their body, they get rid of it in faeces, urine, or sweat. (TECHNICAL or FORMAL)
Your open pores excrete sweat and dirt...
excretion (excretions)
...the excretion of this drug from the body.
N-UNCOUNT: also N in pl
·vt To separate and throw off; to excrete urine.
[?k'skri:t, ?k-]
¦ verb (of a living organism) separate and expel as waste (a substance, especially a product of metabolism).
excreter noun
excretion noun
excretive adjective
excretory adjective
C17: from L. excret-, excernere 'sift out'.



Excretion is a process in which metabolic waste is eliminated from an organism. In vertebrates this is primarily carried out by the lungs, kidneys, and skin. This is in contrast with secretion, where the substance may have specific tasks after leaving the cell. Excretion is an essential process in all forms of life. For example, in mammals, urine is expelled through the urethra, which is part of the excretory system. In unicellular organisms, waste products are discharged directly through the surface of the cell.

During life activities such as cellular respiration, several chemical reactions take place in the body. These are known as metabolism. These chemical reactions produce waste products such as carbon dioxide, water, salts, urea and uric acid. Accumulation of these wastes beyond a level inside the body is harmful to the body. The excretory organs remove these wastes. This process of removal of metabolic waste from the body is known as excretion.

Green plants produce carbon dioxide and water as respiratory products. In green plants, the carbon dioxide released during respiration gets used during photosynthesis. Oxygen is a by product generated during photosynthesis, and exits through stomata, root cell walls, and other routes. Plants can get rid of excess water by transpiration and guttation. It has been shown that the leaf acts as an 'excretophore' and, in addition to being a primary organ of photosynthesis, is also used as a method of excreting toxic wastes via diffusion. Other waste materials that are exuded by some plants — resin, saps, latex, etc. are forced from the interior of the plant by hydrostatic pressures inside the plant and by absorptive forces of plant cells. These latter processes do not need added energy, they act passively. However, during the pre-abscission phase, the metabolic levels of a leaf are high. Plants also excrete some waste substances into the soil around them.

In animals, the main excretory products are carbon dioxide, ammonia (in ammoniotelics), urea (in ureotelics), uric acid (in uricotelics), guanine (in Arachnida), and creatine. The liver and kidneys clear many substances from the blood (for example, in renal excretion), and the cleared substances are then excreted from the body in the urine and feces.

Aquatic animals usually excrete ammonia directly into the external environment, as this compound has high solubility and there is ample water available for dilution. In terrestrial animals ammonia-like compounds are converted into other nitrogenous materials, i.e. urea, that are less harmful as there is less water in the environment and ammonia itself is toxic. This process is called detoxification.

Birds excrete their nitrogenous wastes as uric acid in the form of a paste. Although this process is metabolically more expensive, it allows more efficient water retention and it can be stored more easily in the egg. Many avian species, especially seabirds, can also excrete salt via specialized nasal salt glands, the saline solution leaving through nostrils in the beak.

In insects, a system involving Malpighian tubules is used to excrete metabolic waste. Metabolic waste diffuses or is actively transported into the tubule, which transports the wastes to the intestines. The metabolic waste is then released from the body along with fecal matter.

The excreted material may be called ejecta. In pathology the word ejecta is more commonly used.

Pronunciation examples for Excrete
1. and excretes sulfuric acid.
2. excretes a lot of oxytocin.
Wendy Walsh _ Talks at Google
3. excreta to manage every year.
Pandemic - Tracking Contagions, from Cholera to Ebola and Beyond _ Sonia Shah _ Talks at Google
4. so that they excrete it.
Flavor Science - What's Really in a Pumpkin Spice Latte
5. And it excretes alcohol and carbon dioxide.
The Science of Whiskey _ Anthony Caporale _ Talks at Google
Examples of use of Excrete
1. Infected poultry excrete virus in their secretions and faeces.
2. The mussels also eat microscopic algae and excrete nutrient–rich wastes, he said.
3. Their gills are altered to retain water and nutrients, while they excrete nitrogen waste through their skin.
4. We don‘t know how much virus the cats would excrete, how much people would need to be exposed to before they would fall ill," Cheng said.
5. "Cats normally pick it up in their first wild meal and then excrete it intensely for a few weeks.