ice needle

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  • noun

Synonyms for ice needle

References in periodicals archive ?
The bigger the corona, the smaller the droplets or ice needles causing it.
If thin clouds contain waterdrops or ice needles of nearly uniform size, a colorful bull's-eye pattern of alternating green and red circles may appear around the Sun or Moon due to diffraction effects.
They are diffraction patterns as light interacts with tiny water droplets or ice needles.
More easily viewed near the Moon than near the blinding Sun, such coronas are interference patterns in the light diffracted by microscopic water droplets or ice needles.