How would you like to use PONS.com?

Already a PONS subscriber?
Log in here.

PONS with ads

Go to PONS.com as usual with ad tracking and advertisements.

You can find details of tracking in Information about data protection and under Privacy settings.

PONS Pur

without advertising by third parties

without ad tracking

Subscribe now

If you already have a user account for PONS.com, then you can subscribe to PONS Pur here.

Legal noticeData protectionPrivacy settings

in the PONS Dictionary

rar·efac·tion [ˌreərɪˈfækʃən, -rə-, Am ˌrerə-] N

rarefaction of air PHYS
Luftverdünnung f

Examples from the PONS Dictionary (editorially verified)

rarefaction of air PHYS
Luftverdünnung f

Browse the dictionary

Look up "rarefaction" in other languages

en flagpl flag English Polish
dev
dev
dev
dev