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fractionist▼adjective[UK: ˈfrækʃənɪst ] [US: ˈfrækʃənɪst ]
diffraction grating [diffraction gratings]▼◼◼◼noun
grating [gratings]▼◼◼◼noun[UK: ˈɡreɪt.ɪŋ] [US: ˈɡreɪt.ɪŋ]
refractional▼adjective[UK: rɪ.ˈfræk.ʃənl] [US: rɪ.ˈfræk.ʃənl]
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