そくめん側面sokumen
1.
A flat surface that forms part of a three-dimensional object, excluding the top and bottom surfaces, often seen from the sides.
2.
The lateral face of an object as perceived from a frontal perspective, typically representing a position that is neither the front nor the back.
3.
A particular aspect or characteristic of a person or thing that may not be immediately apparent, revealing a different dimension of their nature or identity.
4.
A supportive angle or position that is not directly aligned with the main focus or center, implying assistance or influence from a less obvious direction.
Example:
鳥類の発声において真に驚異的な点は、鳴管の２つの側面が独立して動くことができるということである。