You searched for: “ageotropic
ageotropic (adjective) (not comparable)
Not reacting to gravity, thus moving or turning away from the earth: Some kinds of ivy are ageotropic in that the plants secure their roots in the trucks of trees while growing upwards into the branches.

Maybe a hot-air balloon is considered to be ageotropic because the aircraft is lighter than air and rises up into the atmosphere and is carried by or progresses with the wind.

This entry is located in the following units: geo-, ge- + (page 1) -ic (page 8)