plas·ma | \ˈplaz-mə \

Definition of plasma 

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

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

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Other Words from plasma

plasmatic \plaz-ˈma-tik \ adjective

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

In May, Ball underwent a platelet-rich plasma injection in his left knee to help heal it. Tania Ganguli,, "Lonzo Ball awaits more information on left meniscus, but injury isn't considered serious," 30 June 2018 At the instant of connection, a vast electrical current can flow, dumping so much heat in the channel that air is converted to a plasma. Helen Czerski, WSJ, "A Crash Course in Summer Thunderstorms," 27 June 2018 This looks like a sheet of steel that has been plasma arc cut. Jeanne Huber, sacbee, "No need to get all bent over sculpture rust," 22 June 2018 In the Prada SoHo epicenter, OMA inserted plasma screens seamlessly into fitting-room mirrors so that customers trying on clothes were recorded from all angles for a visual playback. Courtney Coffman, The Atlantic, "Shops Aren’t for Shopping Anymore," 19 June 2018 But modern plasma products do not carry such risks. The Economist, "Lift bans on paying for human-blood plasma," 12 May 2018 The Parker will be entering the sun's corona, an envelope of plasma that surrounds the star. David Grossman, Popular Mechanics, "Upcoming Solar Probe Gets Its All-Important Heat Shield," 9 July 2018 Ohtani has a Grade 2 sprain of his ulnar collateral ligament, and the Angels are trying to avert Tommy John surgery by giving Ohtani platelet-rich plasma and stem cell injections. Tyler Kepner, New York Times, "A Rookie Treasures Lessons From Roy Halladay," 16 June 2018 The 23-year-old underwent platelet-rich plasma and stem cell injections and was expected to be evaluated three weeks after he was injured. Charlotte Carroll,, "Report: Shohei Ohtani's UCL Tear Isn't Related to Previous One," 14 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'plasma.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of plasma

1517, in the meaning defined at sense 1

History and Etymology for plasma

German, from Late Latin, something molded, from Greek, from plassein to mold — more at plaster

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Dictionary Entries near plasma





plasma cell



Statistics for plasma

Last Updated

3 Oct 2018

Look-up Popularity

Time Traveler for plasma

The first known use of plasma was in 1517

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More Definitions for plasma



English Language Learners Definition of plasma

medical : the watery part of blood that contains blood cells

: a substance that is similar to a gas but that can carry electricity

: a type of visual display for computers, televisions, etc., that uses plasma with electrical charges between two sheets of glass and that produces pictures that are very clear and bright


plas·ma | \ˈplaz-mə \

Kids Definition of plasma

: the watery part of blood, lymph, or milk


plas·ma | \ˈplaz-mə \

Medical Definition of plasma 

1a : 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

3 : a mixture of starch and gel used as an ointment base

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Comments on plasma

What made you want to look up plasma? Please tell us where you read or heard it (including the quote, if possible).


evasion of direct action or statement

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