- easeLack of difficulty; the ability to do something easily.
- ansaThe most protruding part of planetary rings as seen from a distance, perceived to project like handles on either side of the disc of the planet.
- ansa compoundAny cyclophane in which the para positions of a benzene ring are connected by a bridge of at least 10 atoms.
- ansamycinAny of a family of secondary metabolites with antimicrobial and antiviral effects.