Brit·ton·ic 
(brĭ-tŏnĭk) also Bry·thon·ic (-thŏn-)
(brĭ-tŏnĭk) also Bry·thon·ic (-thŏn-)n.
The subdivision of the Insular Celtic languages that includes Welsh, Breton, and Cornish.
[Ultimately from Latin Brittonēs, Britons; see BRITON.]
- photometrically
- photometric brightness
- photometrist
- photometry
- photomicrograph
- photomicrographer
- photomicrographic
- photomicrography
- photomicroscope
- photomicroscopic
- photomontage
- photomultiplier
- photomural
- photomuralist
- photon
- photonegative
- photonic
- photonics
- photonuclear
- photo-offset
- photo op
- photo opportunity
- photoperiod
- photoperiodic
- photoperiodism