photometrical
Pho`to*met"ric, Pho`to*met"ric*al, a. Etym: [Cf. F. photométrique.] Defn: Of or pertaining to photometry, or to a photometer.
Pho`to*met"ric, Pho`to*met"ric*al, a. Etym: [Cf. F. photométrique.] Defn: Of or pertaining to photometry, or to a photometer.