semitransparent body; translucent body
Technical term used in physics, optics, and materials science to describe an object that allows light to pass through diffusely.
A translucent body has the property of diffusing and transmitting light.
透明体 is a transparent body that allows light to pass through without significant scattering, while 半透明体 is semitransparent or translucent, scattering light.
不透明体 is an opaque body that does not transmit light, contrasting with the partial light transmission of 半透明体.
Compound of 半 (half, semi-), 透明 (transparent), and 体 (body). The term follows standard Sino-Japanese word formation patterns for scientific vocabulary.