seis·mo·scope 
(sīzmə-skōp′)
(sīzmə-skōp′)n.
An instrument that indicates the occurrence or time of occurrence of an earthquake.
seis′mo·scopic (-skŏpĭk) adj.
- 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
- photophilic
- photophilous