A group of one or more species derived from a sequential development pattern which involves continual and uniform changes from an extinct ancestral form on an evolutionary scale.

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

The Mayan language spoken by these people.

(medicine, psychiatry) The inability to feel pleasure from activities usually found enjoyable, such as exercise, hobbies, music, sexual activities or social interactions.