preservative /prɪˈzɚvətɪv/ noun plural preservatives
plural preservatives
Learner's definition of PRESERVATIVE
[count, noncount]
: a substance that is used to preserve something防腐剂: such as
a : a chemical that is added to food to keep it fresh longer（食品）防腐剂 b : a substance that is used on wood to prevent it from decaying（木材）防腐剂，防护剂