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in the PONS Dictionary

aha [ɑ:ˈhɑ:] INTERJ

aha (in understanding)
aha
aha (in glee)
haha

AHA [ˌeɪeɪtʃˈeɪ] N

AHA abbreviation of alpha-hydroxy acid

AHA
AHA f
See also

alpha-hy·droxy acid [ˌælfəhaɪˌdrɒksiˈæsɪd, Am -drɑ:k-] N CHEM

alpha-hydroxy acid
AHA-Fruchtsäure f
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