ascending node

GNU Webster's 1913

1. adj. having, that node of the moon or a planet wherein it passes the ecliptic to proceed northward. It is also called the northern node.
2. n. (Astron.) the node at which the body is passing northerly, marked with the symbol ☊, called the Dragon's head. Called also northern node.

WordNet 3.0

1. n. the point at which an orbit crosses the ecliptic plane going north