Dutch

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Dutch Wikipedia has an article on:
Wikipedia nl

Etymology

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From breking +‎ -s- +‎ index.

Pronunciation

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  • IPA(key): /ˈbreː.kɪŋsˌɪn.dɛks/
  • Audio:(file)
  • Hyphenation: bre‧kings‧in‧dex

Noun

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brekingsindex m (plural brekingsindices or brekingsindexen)

  1. (optics) refractive index