- belonging or pertaining to acids or the anhydrides of acids.
- having only a part of the hydrogen of an acid replaced by a metal or its equivalent: an acid phosphate.
- having a pH value of less than 7.Compare alkaline (def. 4).
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MORE ABOUT ACID
What does acid mean?
In science, an acid is a sour-tasting substance that releases hydrogen ions when added to water. Acids will turn litmus to a red color and have a pH lower than 7.
An acid is any substance that will release hydrogen ions when mixed with water. The amount of hydrogen ions that a substance releases is measured on the pH scale, which ranges from 0 to 14. The lower the pH number is, the more hydrogen ions that are being released. Water has a pH of 7, which is neutral on the pH scale. All acids have a pH lower than 7. A pH greater than 7 indicates an alkali, or base.
Acids also have a sour taste, such as the acid found in lemons. A final quality that all acids share is that when they come into contact with litmus paper, they will turn the paper red.
Acids are all around us and are used for a wide variety of purposes. Some common acids you can find in your house include lactic acid (in milk), ascorbic acid (in citrus fruits), and acetic acid (in vinegar).
Why is acid important?
The first records of the term acid come from around 1620. It comes from the Latin word acidus meaning “sour.” Acids have a sour taste, although sometimes it is a very bad idea to put an acid in your mouth.
Several types of acids, such as the ones present in foods we commonly eat, are not only safe to eat but your body actually needs them to stay healthy. Some acids, however, are dangerous and can damage your skin if it touches it or organs if ingested. Hydrochloric acid, which is used in manufacturing, and sulfuric acid, which is used in making fertilizers, are two acids that can burn your skin, damage your organs, and lead to serious health problems with prolonged exposure. Substances like these are considered to be hazardous materials, and there are usually strict laws about handling and transporting these dangerous acids.
Did you know … ?
Your stomach uses a substance called gastric acid to digest the food you eat. It’s also able to kill many bacteria and other organisms that might be in your food or that enter your stomach. Some diseases, spicy foods, or even stress can cause your stomach acid to enter your esophagus. This condition is known as acid reflux. This is why medicines that treat acid reflux by neutralizing stomach acid are referred to as antacids.
What are real-life examples of acid?
Students of chemistry learn about acids early in their studies.
— Julian Borg (@JulianBorg10) October 1, 2020
my chemistry teacher just told us a rhyme about someone who died from drinking sulfuric acid ❤️✨ the more you know 🥰
— tara (@SANlTYLACED) May 7, 2020
True or False?
Acids have a pH higher than 7.
How to use acid in a sentence
The researchers’ process involves first bathing the bricks in a hydrochloric acid vapor, which seeps into the pores and reacts with the iron oxide that gives the bricks their red color.Scientists Found a Way to Turn Bricks Into Batteries|Edd Gent|August 17, 2020|Singularity Hub
Other methods exist to determine whether people are capable of infecting others, including monoclonal antibodies and CRISPR gene-editing techniques to detect viral proteins or bits of nucleic acid.The Case for Rapid At-Home COVID Testing for Everyone - Facts So Romantic|Robert Bazell|August 5, 2020|Nautilus
There, Gilbert uses amino acids to get proteins to communicate with each other.The superheroes in these comics were inspired by real scientists|Kyle Plantz|July 28, 2020|Science News For Students
Most potential drug targets are proteins, and a protein’s structure—meaning the way a 2D sequence of amino acids folds into a 3D protein—determines its function.How AI Will Make Drug Discovery Low-Cost, Ultra-Fast, and Personalized|Peter H. Diamandis, MD|July 23, 2020|Singularity Hub
Sasselov has encouraged Globus and Blandford to consider whether cosmic rays might join forces with polarized light to shape the amino acids on asteroids.Cosmic Rays May Explain Life’s Bias for Right-Handed DNA|Charlie Wood|June 29, 2020|Quanta Magazine
I write the lyrics and work with Murv Douglas from Lords of Acid.Porn Stars on the Year in Porn: Drone Erotica, Belle Knox, and Wild Sex|Aurora Snow|December 27, 2014|DAILY BEAST
During the height of his disenchantment, he visited his hometown where an old friend gave him some liquid acid.DJ Spooky Wants You To Question Everything You Know About Music, Technology, and Philosophy|Oliver Jones|December 27, 2014|DAILY BEAST
Eggs, he says, are a good source of cysteine, an amino acid that helps the liver break down alcohol faster.
This at-home blood test kit gives a full reading of antioxidant, fatty acid, or vitamin panels.
The recent spate of acid attacks on women is only the latest manifestation of this dangerous trend.
There are a number of bacilli, called acid-fast bacilli, which stain in the same way as the tubercle bacillus.
The amount of the other purin bodies together is about one-tenth that of uric acid.
Uric acid is decreased before an attack of gout and increased afterward, but its etiologic relation is still uncertain.
An increase is also noted in the uric-acid diathesis and in diseases accompanied by respiratory insufficiency.
Indol is absorbed and oxidized into indoxyl, which combines with potassium and sulphuric acid and is thus excreted.
British Dictionary definitions for acid
- of, derived from, or containing acidan acid radical
- being or having the properties of an acidsodium bicarbonate is an acid salt
Derived forms of acidacidly, adverbacidness, nounacidy, adjective
Word Origin for acid
Scientific definitions for acid
Other words from acidacidic adjective
Cultural definitions for acid
A sour-tasting material (usually in a solution) that dissolves metals and other materials. Technically, a material that produces positive ions in solution. An acid is the opposite of a base and has a pH of 0 to 7. A given amount of an acid added to the same amount of a base neutralizes the base, producing water and a salt. Common vinegar, for example, is a weak solution of acetic acid.