downpointer
noun 2
Definitions
noun
1
A pointer in a hierarchical data structure that points to the node that is down from the current node.
Except at level zero, the downpointer always points down.
[…] this data structure differs from the tree […] illustrated in Fig. 1, only by having downpointers replaced by downtrees.
2
An indicator that points toward the ground.
During one session , the subject used a canopy-mounted downpointer to estimate position in space relative to the ground, and in the other session the subject used a joystick-controlled, inside-out, aircraft attitude indicator.
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