planum

From LSJ

ἐν πίθῳ τὴν κεραμείαν μανθάνειν → in breaking many pots, the potter learns his craft | of those who undertake the most difficult tasks without learning the elements of the art | don't run before you can walk

Source

Latin > English (Lewis & Short)

plānum: i, n., v. planus, I. B.

Latin > English

planum plani N N :: plan (drawing)