What does "plasticizer" mean?

Any of various substances added to a material (such as plastic or concrete) in order to make it more pliable.

What is a synonym for "plasticizer"?

Common synonyms include: plasticiser, softener.

Pronounced //ˈplæs.tɪ.saɪ.zə//.

/ˈplæs.tɪ.saɪ.zə/ noun

noun ·Rare ·Advanced level

Noun

1
Any of various substances added to a material (such as plastic or concrete) in order to make it more pliable.
2
a substance added to plastics or other materials to make them more pliable wordnet

From plasticize + -er.