pho·tot·o·nus 
(fō-tŏtn-əs)
(fō-tŏtn-əs)n.
The state of being sensitive to or irritated by light.
pho′to·tonic (fō′tə-tŏnĭk) adj.
- brachiation
- brachiocephalic
- brachiocephalic artery
- brachiocephalic vein
- brachiopod
- brachiosaur
- brachiosaurid
- brachiosaurus
- brachium
- brachy-
- brachycephalic
- brachycephalism
- brachycephalous
- brachycephaly
- brachydactylia
- brachydactylic
- brachydactylous
- brachydactyly
- brachylogy
- brachypterism
- brachypterous
- brachytherapy
- brachyuran
- brachyurous
- bracing