P3H4O1T1O1I1O1N1I1Z10E1
25 points
PHOTOIONIZE is validvalid
to ionize under the influence of light [v PHOTOIONIZED, PHOTOIONIZES, PHOTOIONIZING] : PHOTOIONIZATION [n]
to ionize by electromagnetic radiation, also PHOTOIONISE [v PHOTOIONIZED, PHOTOIONIZING, PHOTOIONIZES]