2. Noun. (astronomy) a plain or plateau on a moon or planet ¹
¹ Source: wiktionary.com
Medical Definition of Planum
1. A plane or flat surface. See: plane. Origin: L. Plane (05 Mar 2000)
Lexicographical Neighbors of Planum
Other Resources:
2. Noun. (astronomy) a plain or plateau on a moon or planet ¹
¹ Source: wiktionary.com
1. A plane or flat surface. See: plane. Origin: L. Plane (05 Mar 2000)