Although the Greek roots of the word pedagogy refer to teaching children, until the second half of the 20th century it was applied to any teaching-learning transaction regardless of the age of the learner. Some educators still use pedagogy in this generic way. A neologism is a newly coined word or phrase that is just emerging into mainstream use, and the educational term andragogy has evolved relating to adult learning. Finally, the term metagogy is introduced as a way to blend aspects of both pedagogy and andragogy in a way that meets the needs of adult learners depending on their needs in a specific educational context.