Definition of zero crossing in English:

zero crossing

Line breaks: zero cross|ing

Entry from British & World English dictionary

noun

Mathematics
The point at which a function crosses the horizontal axis as its value passes through zero and changes sign: an accumulation of zero crossings [as modifier]: it dramatically reduces zero-crossing distortion

Definition of zero crossing in:

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Word of the day neoteny
Pronunciation: niːˈɒt(ə)ni
noun
retention of juvenile features in the adult animal