1
: a green faintly translucent quartz
2
[New Latin, from Late Latin]
a
: the fluid part of blood, lymph, or milk as distinguished from suspended material
especially
: blood plasma
b
: the juice that can be expressed from muscle
3
4
: a collection of charged particles (as in the atmospheres of stars or in a metal) containing about equal numbers of positive ions and electrons and exhibiting some properties of a gas but differing from a gas in being a good conductor of electricity and in being affected by a magnetic field
5
: a display (such as a television screen) consisting of discrete cells of plasma sandwiched between two layers of glass and electrodes such that each cell emits light when it receives an electric current
Examples of plasma in a Sentence
the plasma that makes up a star
Our new TV is a 50-inch plasma.
Recent Examples on the Web
This phenomenon makes the sun’s surface look grainy, and scientists say the star’s magnetic field is driven by the churning plasma.
—
Margherita Bassi, Smithsonian Magazine, 21 Nov. 2024
Immunoglobulin therapy is prepared from a pool of antibodies taken from the plasma of thousands of healthy donors.
—New Atlas, 27 Oct. 2024
These alternative treatments include microneedling, platelet-rich plasma (PRP), laser therapy, ultrasound skin tightening, and radiofrequency treatments.
—Audrey Noble, Vogue, 21 Oct. 2024
The plasma needs to stay extremely hot – over 100 million degrees Celsius – and condensed for the duration of the reaction.
—Sophie Blondel, The Conversation, 18 Oct. 2024
See all Example Sentences for plasma 
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Margherita Bassi, Smithsonian Magazine, 21 Nov. 2024
Immunoglobulin therapy is prepared from a pool of antibodies taken from the plasma of thousands of healthy donors.
—New Atlas, 27 Oct. 2024
These alternative treatments include microneedling, platelet-rich plasma (PRP), laser therapy, ultrasound skin tightening, and radiofrequency treatments.
—Audrey Noble, Vogue, 21 Oct. 2024
The plasma needs to stay extremely hot – over 100 million degrees Celsius – and condensed for the duration of the reaction.
—Sophie Blondel, The Conversation, 18 Oct. 2024
See all Example Sentences for plasma
Dictionary Entries Near plasma
Cite this Entry
“Plasma.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/plasma. Accessed 29 Nov. 2024.
Copy CitationKids Definition
plasma
noun
plas·ma
ˈplaz-mə 
1
: the watery part of blood, lymph, or milk
2
: a collection of charged particles that shows some characteristics of a gas but that differs from a gas in being a good conductor of electricity and in being affected by a magnetic field
Medical Definition
plasma
noun
plas·ma
ˈplaz-mə
1
a
: the fluid part especially of blood, lymph, or milk that is distinguished from suspended material see blood plasma
b
: the juice that can be expressed from muscle
2
3
: a mixture of starch and gel used as an ointment base
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