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Pronunciation varies by accent · noun
A reduction in the density of a material, especially that of a fluid..
[T]his ſeal'd vial, being broken under water, ſuck'd in a conſiderable quantity of it, whether, becauſe of ſome little rarefaction of the Air included in the ſealing, or becauſe of the infrigidation of that Air by the ſnow, or for both theſe Reaſons, or any other, I ſhall not Now diſpute.
Use rarefaction when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Rarefaction means A reduction in the density of a material, especially that of a fluid..
The closest synonym depends on the sentence and intended sense.
Possible antonyms include compression.
[T]his ſeal'd vial, being broken under water, ſuck'd in a conſiderable quantity of it, whether, becauſe of ſome little rarefaction of the Air included in the ſealing, or becauſe of the infrigidation of that Air by the ſnow, or for both theſe Reaſons, or any other, I ſhall not Now diſpute.
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