Before revision: Twixter is a neologism that describes a new generation of young adults in America and other industrialized countries who are trapped, in a sense, betwixt (between) adolescence and adulthood.
After revision: Twixter is a neologism that describes a new generation of young adults in the United States and other industrialized countries who are trapped, in a sense, betwixt (between) adolescence and adulthood.