ˈ ̷ ̷_lə̇s adjective
Etymology: strain (III) + -less
1. : free from strain or straining tension
2. of a ring in a chemical compound : characterized by bond angles in the structure that are approximately the same as those in comparable acyclic compounds
strainless 5- and 6-membered rings in natural organic products
— compare boat form , chair form ; baeyer strain theory
• strain·less·ly adverb