photostimulated

Etymology tree
Proto-Indo-European *bʰeh₂-
Proto-Indo-European *bʰéh₂os
Proto-Hellenic *pʰáwos
Ancient Greek φᾰ́ος (phắos)
Ancient Greek φῶς (phôs)
Ancient Greek φωτο- (phōto-)der.
English photo-
Proto-Indo-European *(s)tey-?
Latin stimulus
Latin stimulo
Latin stimulatusbor.
English stimulate
Proto-Germanic *-ōd-
Old English -ode
Middle English -ede
English -ed
English stimulated
English photostimulated
From photo- + stimulated.