罗经 and
罗盘 (luópán) are interchangeable. The
罗 comes from
罗列 (rows / array) and
经 from
经纬 (longitude/latitude lines) — together suggesting the rings of degree marks around the magnetic needle. In feng shui, a
罗经 has many concentric rings encoding the 24 directions, the 64 trigrams, and other cosmological data.