fas·tig·i·um 
(fă-stĭjē-əm)
(fă-stĭjē-əm)n.
The period of maximum severity or intensity of a disease or fever.
[Latin fastīgium, apex, height.]
- photo-essayist
- photo finish
- photoflash
- photoflood
- photofluorogram
- photofluorographic
- photofluorography
- photog
- photogelatin process
- photogene
- photogenic
- photogenically
- photogram
- photogrammetric
- photogrammetrist
- photogrammetry
- photograph
- photographable
- photographer
- photographic
- photographical
- photographically
- photography
- photogravure
- photoheliograph