Dark is ambiguous: it can mean light is not emitted, but it can also mean light is absorbed.
Even going with the first one, it's an incomplete description at best. "Dark" matter does not simply fail to emit light; it does not interact with light at all (other than by gravity, and that only bends it slightly, no absorption or emission involved).
Transparent fully captures this.
The overloaded meanings of those words which you are invoking are not relevant to the description of a physical property.
Even going with the first one, it's an incomplete description at best. "Dark" matter does not simply fail to emit light; it does not interact with light at all (other than by gravity, and that only bends it slightly, no absorption or emission involved).
Transparent fully captures this.
The overloaded meanings of those words which you are invoking are not relevant to the description of a physical property.