planation noun.
[plǝ'neɪʃ(ǝ)n] L19.[from PLANE noun1 + -ATION.]Physical Geography. The levelling of a landscape by erosion.
■ planate verb trans. make level by erosion (orig. & chiefly as
■ planated ppl adjective.)
E20. [TahlilGaran] English Dictionary ▲