Definition of terrae:
(n) :
(literary) Earth, soil, land, or ground as a physical surface.
(n) :
A continent or large landmass, especially on another planet or moon; e.g. Arabia Terra or Aphrodite Terra.
(n) :
A lunar highland or mountainous region with relatively high albedo; e.g. Terra Nivium.
(n) :
(archaic) The material world as opposed to the heavens.
(n) :
(astronomy) The planet Earth.
(n) :
A female given name.