The Synoptic Gospels is a term used by modern New Testament scholars for the Gospels according to Matthew, Mark, and Luke of the New Testament in the Bible. They are three of the four gospels, of which the Gospel of John is not included due to it's different style from the other three gospels.
The term synoptic is derived from a combination of the Greek words ??? (syn = together) and ???? (opsis = seeing) to indicate that the contents of these three Gospels can be viewed side-by-side, whether in a vertical parallel column synopsis, or a horizontal synoptic alignment.
- Synoptic Gospels (Wikipedia)