Infrared and Nonvisual

Infrared adjective - Having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end.

Nonvisual and infrared are semantically related. In some cases you can use "Nonvisual" instead an adjective "Infrared".

Nonvisual adjective - Not resulting in vision.

Infrared and nonvisual are semantically related. You can use "Infrared" instead an adjective "Nonvisual".