a. 有助于保存的, 有保存力的

n. 预防药, 防腐剂

[化] 防腐剂; 保存剂

[医] 防腐剂, 保存剂

Preservative \Pre*serv"a*tive\, a. [Cf. F. pr['e]servatif.]
Having the power or quality of preserving; tending to
preserve, or to keep from injury, decay, etc.


Preservative \Pre*serv"a*tive\, n.
That which preserves, or has the power of preserving; a
presevative agent.

To wear tablets as preservatives against the plague.
--Bacon.