Noun. 1. addition reaction-a chemical reaction in which one molecule is added to another. chemical reaction, reaction - (chemistry) a process in which one or more substances are changed into others; there was a chemical reaction of the lime with the ground water. 1  Facebook. 2  Twitter.
Kettlestone is a village and civil parish in the English county of Norfolk. It covers an area of 7.55 km2 (2.92 sq mi) and had a population of 177 in 85 households at the 2001 census, increasing to 197 at the 2011 Census. For the purposes of local government, it falls within the district of North Norfolk.
For other uses, see Standing stone (disambiguation). A menhir (from Brittonic languages: maen or men, stone and hir or hÃ®r, long), standing stone, orthostat, lith or masseba/matseva is a large upright standing stone. Menhirs may be found solely as monoliths, or as part of a group of similar stones.