(botany) Belonging to the Cunoniaceae.

(vulgar) Initialism of fuck all. / (euphemistic) Initialism of Fanny Adams.

A tendency among some conservative Christians, especially in the USA, to seek influence or control over secular civil government through political action.

(chemistry) Any of a group of molecules or ions that have the same number of valence electrons and have chemical or physical similarities. For example, SH, NH2 and CH3 are isosteres of OH.