entropy

noun

en·tro·py ˈen-trə-pē How to pronounce entropy (audio)

plural entropies

thermodynamics : a measure of the unavailable energy in a closed thermodynamic system that is also usually considered to be a measure of the system's disorder, that is a property of the system's state, and that varies directly with any reversible change in heat in the system and inversely with the temperature of the system

broadly : the degree of disorder or uncertainty in a system

: the degradation of the matter and energy in the universe to an ultimate state of inert uniformity

Entropy is the general trend of the universe toward death and disorder.

James R. Newman

: a process of degradation or running down or a trend to disorder

The deterioration of copy editing and proof-reading, incidentally, is a token of the cultural entropy that has overtaken us in the postwar years.

John Simon

: chaos, disorganization, randomness

statistical mechanics : a factor or quantity that is a function of the physical state of a mechanical system and is equal to the logarithm of the probability for the occurrence of the particular molecular arrangement in that state

communication theory : a measure of the efficiency of a system (such as a code or a language) in transmitting information, being equal to the logarithm of the number of different messages that can be sent by selection from the same set of symbols and thus indicating the degree of initial uncertainty that can be resolved by any one message

entropic

en-ˈtrō-pik How to pronounce entropy (audio)

-ˈträ-pik

adjective

entropically

en-ˈtrō-pi-k(ə-)lē How to pronounce entropy (audio)

-ˈträ-

adverb

Did you know?

With its Greek prefix en-, meaning "within", and the trop- root here meaning "change", entropy basically means "change within (a closed system)". The closed system we usually think of when speaking of entropy (especially if we're not physicists) is the entire universe. But entropy applies to closed systems of any size. Entropy is seen when the ice in a glass of water in a warm room melts—that is, as the temperature of everything in the room evens out. In a slightly different type of entropy, a drop of food coloring in that glass of water soon spreads out evenly. However, when a nonphysicist uses the word, he or she is usually trying to describe a large-scale collapse.

Example Sentences

Recent Examples on the Web Hawking's final paper revisited black hole entropy and the no-hair concept.

Jennifer Ouellette, Ars Technica, 9 Sep. 2022 Sabine Hossenfelder on entropy: Entropy is a very anthropomorphic quantity.

Geek's Guide To The Galaxy, WIRED, 9 Sep. 2022 The ambient entropy, which manifested here in the chaotic climate, the shriveling lake, the junk of human settlements laid waste, felt like the ultimate rebuke to our myopia.

Henry Wismayer, Anchorage Daily News, 30 Aug. 2022 The ambient entropy, which manifested here in the chaotic climate, the shriveling lake, the junk of human settlements laid waste, felt like the ultimate rebuke to our myopia.

Henry Wismayer, Washington Post, 29 Aug. 2022 In this case, the entropy is proportional to the three-dimensional volume of the box, not the area.

Edgar Shaghoulian, Scientific American, 22 Aug. 2022 The key is to measure this entanglement entropy in the presence of multiple copies of the system.

Ahmed Almheiri, Scientific American, 17 Aug. 2022 This extra bandwidth can be used for storage functions, such as compression, but it can also be used for other purposes, such as monitoring real time changes in entropy, heat of access and how data is changed and is changing.

Tom Coughlin, Forbes, 13 June 2022 In 1961 physicist Rolf Landauer of IBM’s Thomas J. Watson Research Center in Yorktown Heights, N.Y., showed that conventional computing incurs an unavoidable cost in energy dissipation—basically, in the generation of heat and entropy.

Philip Ball, Scientific American, 29 Mar. 2022 See More

Medical Definition

entropy

noun

en·tro·py ˈen-trə-pē How to pronounce entropy (audio)

plural entropies

: a measure of the unavailable energy in a closed thermodynamic system that is also usually considered to be a measure of the system's disorder and that is a property of the system's state and is related to it in such a manner that a reversible change in heat in the system produces a change in the measure which varies directly with the heat change and inversely with the absolute temperature at which the change takes place

broadly : the degree of disorder or uncertainty in a system

单词	entropy
释义	entropy noun en·tro·py ˈen-trə-pē plural entropies 1 thermodynamics : a measure of the unavailable energy in a closed thermodynamic system that is also usually considered to be a measure of the system's disorder, that is a property of the system's state, and that varies directly with any reversible change in heat in the system and inversely with the temperature of the system broadly : the degree of disorder or uncertainty in a system 2 a : the degradation of the matter and energy in the universe to an ultimate state of inert uniformity Entropy is the general trend of the universe toward death and disorder. James R. Newman b : a process of degradation or running down or a trend to disorder The deterioration of copy editing and proof-reading, incidentally, is a token of the cultural entropy that has overtaken us in the postwar years. John Simon 3 : chaos, disorganization, randomness 4 statistical mechanics : a factor or quantity that is a function of the physical state of a mechanical system and is equal to the logarithm of the probability for the occurrence of the particular molecular arrangement in that state 5 communication theory : a measure of the efficiency of a system (such as a code or a language) in transmitting information, being equal to the logarithm of the number of different messages that can be sent by selection from the same set of symbols and thus indicating the degree of initial uncertainty that can be resolved by any one message entropic en-ˈtrō-pik -ˈträ-pik adjective entropically en-ˈtrō-pi-k(ə-)lē -ˈträ- adverb Did you know? With its Greek prefix en-, meaning "within", and the trop- root here meaning "change", entropy basically means "change within (a closed system)". The closed system we usually think of when speaking of entropy (especially if we're not physicists) is the entire universe. But entropy applies to closed systems of any size. Entropy is seen when the ice in a glass of water in a warm room melts—that is, as the temperature of everything in the room evens out. In a slightly different type of entropy, a drop of food coloring in that glass of water soon spreads out evenly. However, when a nonphysicist uses the word, he or she is usually trying to describe a large-scale collapse. Example Sentences Recent Examples on the Web Hawking's final paper revisited black hole entropy and the no-hair concept. Jennifer Ouellette, Ars Technica, 9 Sep. 2022 Sabine Hossenfelder on entropy: Entropy is a very anthropomorphic quantity. Geek's Guide To The Galaxy, WIRED, 9 Sep. 2022 The ambient entropy, which manifested here in the chaotic climate, the shriveling lake, the junk of human settlements laid waste, felt like the ultimate rebuke to our myopia. Henry Wismayer, Anchorage Daily News, 30 Aug. 2022 The ambient entropy, which manifested here in the chaotic climate, the shriveling lake, the junk of human settlements laid waste, felt like the ultimate rebuke to our myopia. Henry Wismayer, Washington Post, 29 Aug. 2022 In this case, the entropy is proportional to the three-dimensional volume of the box, not the area. Edgar Shaghoulian, Scientific American, 22 Aug. 2022 The key is to measure this entanglement entropy in the presence of multiple copies of the system. Ahmed Almheiri, Scientific American, 17 Aug. 2022 This extra bandwidth can be used for storage functions, such as compression, but it can also be used for other purposes, such as monitoring real time changes in entropy, heat of access and how data is changed and is changing. Tom Coughlin, Forbes, 13 June 2022 In 1961 physicist Rolf Landauer of IBM’s Thomas J. Watson Research Center in Yorktown Heights, N.Y., showed that conventional computing incurs an unavoidable cost in energy dissipation—basically, in the generation of heat and entropy. Philip Ball, Scientific American, 29 Mar. 2022 See More Word History Etymology International Scientific Vocabulary en- entry 2 + Greek tropē change, literally, turn, from trepein to turn First Known Use 1867, in the meaning defined at sense 1 Medical Definition entropy noun en·tro·py ˈen-trə-pē plural entropies : a measure of the unavailable energy in a closed thermodynamic system that is also usually considered to be a measure of the system's disorder and that is a property of the system's state and is related to it in such a manner that a reversible change in heat in the system produces a change in the measure which varies directly with the heat change and inversely with the absolute temperature at which the change takes place broadly : the degree of disorder or uncertainty in a system
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entropy

noun

Did you know?

Example Sentences

Word History

Medical Definition

noun