(Roman Catholicism) The teaching or expression of an opinion in the conscious knowledge that it is contradictory to the teachings of the Church, and as such heretical.

A village and civil parish in Torridge district, Devon, England (OS grid ref SS2524). / A town in Carleton County, New Brunswick, Canada.

(organic chemistry) Any sulfonic acid derived from camphor, but especially d-camphorsulfonic acid (known as Reychler's acid) classically used to resolve stereoisomers

(India, historical) A stonebow (crossbow for shooting stones).