Wiktionary
polyvinylidene
n. 1 (context chemistry English) Any polymer derived from monomers of general formula CH2=CX2 where X is typically a halogen 2 A polyvinylidene resin
Wikipedia
Usage examples of "polyvinylidene".
Polyvinylidene difluoride was a special polymer in that respect—carbon atoms were linked to hydrogen and fluorine atoms in such a way that the resulting substance was even more piezoelectric than quartz.