Wordcyclopedia | English | actively cooled mirror

— If something is done actively, it is done in a way that is active.

— Brought to a lower temperature. — Brought to a lower temperature by means of (often in compounds). — brought to a reduced degree of anger

— A very reflective surface which light can bounce off of. She kept staring at the mirror all day.

— If something/someone mirrors something, then it is identical to it.