spec·tro·he·li·o·graph 
(spĕk′trō-hēlē-ə-grăf′)
(spĕk′trō-hēlē-ə-grăf′)n.
An instrument used to make spectroheliograms.
spec′tro·he′li·o·graphic adj.
spec′tro·he′li·ogra·phy (-ŏgrə-fē) n.
- observingly
- obsess
- obsession
- obsessional
- obsessionally
- obsessive
- obsessive-compulsive
- obsessive-compulsive disorder
- obsessive-compulsive personality disorder
- obsessively
- obsessiveness
- obsessor
- obsidian
- obsolesce
- obsolescence
- obsolescent
- obsolescently
- obsolete
- obsoletely
- obsoleteness
- obsoletism
- obstacle
- obstacle course
- obstetric
- obstetrical