Noun
Same as 1st Plane.
Source: Webster's dictionaryplane-tree
Halin graphs A Halin graph is a graph formed from an undirected plane tree (with no degree-two nodes) by connecting its leaves into a cycle, in the order given by the plane embedding of the tree. Source: Internet
Following a sacrifice to Apollo, a snake slithered from the altar to a sparrow's nest in a plane tree nearby. Source: Internet