P3H4O1T1O1C3H4E1M3I1C3A1L1
27 points
PHOTOCHEMICAL is validvalid
of, relating to, or resulting from the chemical action of radiant energy and esp. light
of, relating to, or resulting from the chemical action of radiant energy and esp. light
of, relating to, or resulting from the chemical action of radiant energy and esp. light
of, relating to, or resulting from the chemical action of radiant energy and esp. light