chron·o·scope 
(krŏnə-skōp′, krōnə-)
(krŏnə-skōp′, krōnə-)n.
An optical instrument for the precise measurement of very small time intervals.
chron′o·scopic (-skŏpĭk) adj.
- contact flight
- contact hitter
- contact inhibition
- contact language
- contact lens
- contact metamorphism
- contactor
- contact print
- contact sport
- contactual
- contactually
- contagia
- contagion
- contagious
- contagious abortion
- contagiously
- contagiousness
- contagium
- contain
- containable
- container
- containerboard
- containerization
- containerize
- container port