Yes, many astrological terms can be obscure.
Very simply, for those unfamiliar with the nodes, the nodes are the points formed by the Moon's orbit around the Earth as they intersect with the Earth's path around the Sun. Clear as mud.
In other words, there are two nodes, the North and South Nodes which appear on the birth-chart 180 degrees apart. The South Node represents the past, the things we have attained, the gifts we bring into this life. The North Node represents our destiny, the things we have to work on and develop.
Some astrologers consider the North Node to be one of the most important features of the birth-chart, and it is often overlooked in an interpretation.
A much recommended book on the North Node in each of the signs is Astrology For The Soul by Jan Spiller. This is fairly straightforward reading.