flavour enhancer
US /ˈfleɪ.vər ɪnˌhæn.sər/
UK /ˈfleɪ.vər ɪnˌhæn.sər/
1.
a substance added to food to improve its taste or smell
:
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Monosodium glutamate (MSG) is a common flavour enhancer.
•
Many processed foods contain artificial flavour enhancers.