PHOTOTELESCOPE
Pho`to*tel"e*scope, n. (Astron.)
Defn: A telescope adapted for taking photographs of the heavenly bodies.
PHOTOTHEODOLITE
Pho`to*the*od"o*lite, n.
Defn: An arrangement of two photographic cameras, the plates of which may be brought into exactly the same plane, used in surveying and map making. From the differences between two pictures taken at the same moment, measurements in all dimensions of the region may be obtained.
PHOTOTHERAPY
Pho`to*ther"a*py, n. (Med.)
Defn: The application of light for therapeutic purposes, esp. for treating diseases of the skin. — Pho`to*the*rap"ic (#), Pho`to*ther`a*peu"tic (#), a.
PHOTOTHERMIC
Pho`to*ther"mic, a.
Defn: Of or pertaining to both light and heat.
PHOTOTONUS
Pho*tot"o*nus, n. Etym: [NL. See Photo-, and Tone.] (Bot.)
Defn: A motile condition in plants resulting from exposure to light.
— Pho`to*ton"ic, a.