Dictionary > Substance

Substance

Definition
noun, plural:substances
(1) The physical matter, material or that of which an organ or body consists.
(2) (chemistry) A material, matter or that which has definite chemical composition and distinct properties.
(3) The most vital or essential part of something.
(4) Drugs, as in substance abuse.
Supplement
In biology, the term substance is used to refer to the material constituting an organ, e.g. ground substance or spongy substance.
In chemistry, all compounds are substances but not all substances are compounds since pure elements are also chemical substances. Chemical compounds may exist as solid, liquid or gas. Examples are water, salt, sugar, etc. Forms of energy such as light and heat are not considered a chemical substance.
Word origin: from Latin substantia, literally meaning “standing under”

Related forms: substantial (adjective)
Related terms:


You will also like...

Freshwater Ecology
Freshwater Ecology

Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..

Cambial cells
Plant Tissues

Plant organs are comprised of tissues working together for a common function. The different types of plant tissues are m..

Muscle
Muscle

Muscle cells are specialized to generate force and movement. Learn about the different types of muscle tissues in this t..

Geological Periods
Geological Periods

Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..

Freshwater aquatic plankton
Freshwater Communities & Plankton

Planktons are microscopic organisms that live suspended in aquatic habitats. There are two groups: the phytoplanktons an..

primitive arthropods
Arthropods

The arthropods were assumed to be the first taxon of species to possess jointed limbs and exoskeleton, exhibit more adva..