smart material
nounUK /smɑːt məˈtɪəriəl/
US /smɑːrt məˈtɪriəl/
A smart material is a special material that can change itself when something around it changes.
The jacket is made of a smart material that keeps you warm when it gets cold.
OTHER MEANINGS
2. A material that changes shape when heated or cooled.
The smart material in the wire bent back to its first shape after it warmed up.
3. A material that can fix small cracks by itself.
The bridge uses a smart material that seals its own tiny cracks.
4. A material that changes color when light or heat changes.
Her cup is coated with a smart material that turns blue when hot water is poured in.