A group adding impetus or spirit on a particular topic, especially within a political party or other organization.

plural of laughing group

plural of Coxeter group

(mathematics, geometry, group theory) Any of a class of groups whose finite cases are precisely the finite reflection groups (including the symmetry groups of polytopes), but which are more varied in their infinite cases, and whose range of application encompasses various areas of mathematics.

(cycling) Synonym of autobus

plural of campaign group

plural of symmetry group

plural of permutation group

plural of group ring

plural of lobby group