The Collaborative International Dictionary
Medium \Me"di*um\, n.; pl. L. Media, E. Mediums. [L. medium the middle, fr. medius middle. See Mid, and cf. Medius.]
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That which lies in the middle, or between other things; intervening body or quantity. Hence, specifically:
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Middle place or degree; mean.
The just medium . . . lies between pride and abjection.
--L'Estrange. (Math.) See Mean.
(Logic) The mean or middle term of a syllogism; that by which the extremes are brought into connection.
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A substance through which an effect is transmitted from one thing to another; as, air is the common medium of sound. Hence: The condition upon which any event or action occurs; necessary means of motion or action; that through or by which anything is accomplished, conveyed, or carried on; specifically, in animal magnetism, spiritualism, etc., a person through whom the action of another being is said to be manifested and transmitted.
Whether any other liquors, being made mediums, cause a diversity of sound from water, it may be tried.
--Bacon.I must bring together All these extremes; and must remove all mediums.
--Denham. -
An average. [R.]
A medium of six years of war, and six years of peace.
--Burke. A trade name for printing and writing paper of certain sizes. See Paper.
(Paint.) The liquid vehicle with which dry colors are ground and prepared for application.
(Microbiology) A source of nutrients in which a microorganism is placed to permit its growth, cause it to produce substances, or observe its activity under defined conditions; also called culture medium or growth medium. The medium is usually a solution of nutrients in water, or a similar solution solidified with gelatin or agar.
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A means of transmission of news, advertising, or other messages from an information source to the public, also called a news medium, such as a newspaper or radio; used mostly in the plural form, i. e. news media or media. See 1st media[2].
Circulating medium, a current medium of exchange, whether coin, bank notes, or government notes.
Ethereal medium (Physics), the ether.
Medium of exchange, that which is used for effecting an exchange of commodities -- money or current representatives of money.
Wiktionary
n. (context microbiology English) A culture medium.
Wikipedia
A growth medium or culture medium is a solid or liquid designed to support the growth of microorganisms or cells, or small plants like the moss Physcomitrella patens. There are different types of media for growing different types of cells.
There are two major types of growth media: those used for cell culture, which use specific cell types derived from plants or animals, and microbiological culture, which are used for growing microorganisms, such as bacteria or yeast. The most common growth media for microorganisms are nutrient broths and agar plates; specialized media are sometimes required for microorganism and cell culture growth. Some organisms, termed fastidious organisms, require specialized environments due to complex nutritional requirements. Viruses, for example, are obligate intracellular parasites and require a growth medium containing living cells.
Usage examples of "growth medium".
Instead of a citrus tree, cultivate in glass the juice vesicles of lemons, say, in a growth medium rich m just those chemicals which instruct the cells to develop into juice sacs.
Sam found himself wondering if pseudoflesh might not be a good growth medium for the mushroom house .
It requires only a little growth medium, has a top to prevent dust and spores from landing on it, and can be baked in steam and reused.
Many elements had to cycle through soil to make it a growth medium for plants, and each element had its own particular cycle, driven by a different collection of agents.
This hill-like clump of growth seemed to be lying over some grayish, spongy growth medium.
She frowned at the image, which showed bacterial cultures on a red growth medium.
One hand held a small pot with some dirt-like growth medium in it.
From one vial, he took a small applicator brush and painstakingly painted a thin strip of growth medium between two silver tracings of circuitry within the case.
The virus will probably take only four to six hours to culture properlyI have a computer parameter that can set up everything quickly as soon as the virus is introduced to the growth medium.