noun, plural flocculi [flok-yuh-lahy] .
Astronomy. one of the bright or dark patches on the sun's surface, visible in a spectroheliogram.

1790–1800; < Neo-Latin; see floccule

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World English Dictionary
flocculus (ˈflɒkjʊləs)
n , pl -li
1.  a marking on the sun's surface or in its atmosphere, as seen on a spectroheliogram. It consists of calcium when lighter than the surroundings and of hydrogen when darker
2.  anatomy a tiny ovoid prominence on each side of the cerebellum
3.  another word for floccule

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Medical Dictionary

flocculus floc·cu·lus (flŏk'yə-ləs)
n. pl. floc·cu·li (-lī')

  1. A small fluffy mass or tuft.

  2. Either of a pair of small lobes on the posterior border of the cerebellum, forming part of the vestibular part of the cerebellum.

The American Heritage® Stedman's Medical Dictionary
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