1.
wave surface; surface of waves
The surface of water as shaped by waves.
2.
wavefront
In physics, a surface connecting all points of a wave that are in the same phase of oscillation.
Composed of 波 (wave) + 面 (surface). Has both an everyday literary sense (the visible surface of water with waves) and a technical physics sense (wavefront). The literary sense appears in nature descriptions, while the technical sense is used in optics, acoustics, and wave physics.