1.
of or relating to Puritans or Puritanism
2.
exaggeratedly proper
3.
morally rigorous and strict
she was anything but puritanical in her behavior
The following are synonyms for 'puritanical'. Click on any of them to get both Bibliodata's full list of common definitions and a further set of synonyms.
Swiss engineer George de Mestral, who got the idea after noticing burrs were sticking to his pants after his regular walks through the woods, invented Velcro.