Meaning Definition of ACID


Acid is a noun that denotes a chemical substance with a sour taste, capable of turning blue litmus paper red, and reacting with bases to form salts. It is characterized by its ability to donate protons or accept pairs of electrons in chemical reactions.

Noun – Chemical Substance: As a noun, acid refers to a class of compounds characterized by their acidic properties, which include a sour taste and the ability to react with certain metals to produce hydrogen gas. Acids can be found naturally in various foods and beverages, such as citrus fruits and vinegar, as well as in industrial processes and laboratory settings.

Noun – pH Indicator: Acids are typically defined by their pH level, with pH values below 7 indicating acidity. The lower the pH value, the stronger the acid. Acids can range from weak, such as acetic acid found in vinegar, to strong, such as hydrochloric acid used in industrial applications.

Noun – Chemical Reactions: In chemical reactions, acids can donate protons (H⁺ ions) to other substances, known as bases, to form water and salts in a process called neutralization. This ability to react with bases is a fundamental property of acids and is central to many chemical processes and industrial applications.

Industrial and Laboratory Uses: Acids have numerous industrial and laboratory uses, ranging from the production of fertilizers, pharmaceuticals, and cleaning agents to the refining of metals and the synthesis of organic compounds. They are also used in various chemical analyses, such as titrations, and as catalysts in certain reactions.

Environmental Impact: While acids play essential roles in various industrial processes, they can also have negative environmental impacts if not handled or disposed of properly. Acidic pollutants released into the air or water can contribute to acid rain, soil acidification, and ecosystem degradation, posing risks to human health and the environment.

In conclusion, acid is a noun that refers to a chemical substance characterized by its sour taste, ability to turn litmus paper red, and capacity to donate protons in chemical reactions. Acids play crucial roles in various industrial processes, laboratory analyses, and biological functions, but their use must be managed carefully to minimize environmental harm and ensure human safety. Understanding the properties and behavior of acids is essential for their responsible use and sustainable management in diverse applications.

Examples of ACID in a sentence

  • The acid in the solution gave it its distinctive sourness.
  • She added a small amount of acid to balance the flavors in the dish.
  • Acid is commonly found in vinegar and contributes to its tart taste.
  • The strong odor of acid filled the laboratory during the experiment.
  • The manufacturer used acid as a preservative in the food product.
  • Acid is used in various industries, including pharmaceuticals and textiles.
  • The acid content in the wine gave it a sharp acidity.
  • The cleaning solution contained a diluted form of acid for removing stubborn stains.

Etymology Origin of ACID 

The term “acid” has its etymological roots in Latin. It ultimately derives from the Latin word “acidus,” which means “sour” or “tart.” The Latin term “acidus” itself is derived from the verb “acere,” meaning “to be sour” or “to taste sour.”

The use of the term “acid” to describe substances with a sour taste, such as vinegar, dates back to ancient times. Over the centuries, as scientific understanding of these substances evolved, the term became associated with substances that could donate protons in chemical reactions, leading to the modern chemical definition of acids.


  • Sour
  • Pungent
  • Sharp 
  • Tart 
  • Biting 
  • Acidic 
  • Acerbic 
  • Acrid


  • Bland
  • Dull
  • Mild
  • Alkaline
  • Base
  • Neutralizer
  • Antacid
  • Alkali


  • Base
  • PH
  • Sulphuric Acid
  • Hydroxide
  • Potential of Hydrogen
  • Basic
  • Acidulous 
  • Acerb

🌐 🇬🇧 ACID in other languages

Terms of Use

Privacy & Cookies


Who We Are

Main Sections


Geographical Locations



Let´s Talk



® 2024