An imaginary circle on the surface of the Earth, the latter being regarded as being cut by the plane through the centre of the Earth perpendicular to the polar axis; it divides the Earth into the northern and southern hemispheres, and is the primary circle from which terrestrial latitudes are measured,

Link to This Definition

Did you find this definition of TERRESTRIAL EQUATOR helpful? You can share it by copying the code below and adding it to your blog or web page.
Edited and fact checked by Pam: Google +