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optics▼◼◼◼[UK: ˈɒp.tɪks] [US: ˈɑːp.tɪks]
holography [holographies]▼◼◼◼noun[UK: hɒ.ˈlɒ.ɡrə.fɪ] [US: hə.ˈlɑː.ɡrə.fiː]
fiber optics▼◼◼◼
fibre optics▼◼◼◼
collimator [collimators]▼◼◼◼noun[UK: kˈɒlɪmˌeɪtə] [US: kˈɑːlᵻmˌeɪɾɚ]
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