Having a stereochemical regularity where the molecules can be described in terms of alternation of configurational base units that are mirror images of one another. Found on https://www.emcoplastics.com/plastic-glossary-of-terms/
(of a polymer molecule) having a regular alternation of opposite configurations at successive regularly spaced positions along the chain. Cf.(def. 4). Found on https://www.infoplease.com/dictionary/syndiotactic