zonule

noun

1. A little zone, or girdle; a zonula.

   1963, M. G. Farquar, G. E. Palade, Junctional complexes in various epithelia, The Journal of Cell Biology, Volume 17, republished 2001, Joseph G. Gall, J. Richard McIntosh (editors), Landmark Papers in Cell Biology, page 261, Each tight junction is followed by an adhering zonule extending between arrows 2 and 3 and, farther away, by a desmosome marked D. A condensation of finely fibrillar material occurs mainly along the adhering zonules on each side of the bile capillary.

2. The zonule of Zinn.

   The rim of a small-sized lens along with zonule is clearly seen through the fully dilated pupil.

Where it comes from

From Latin zōnula (“small belt or girdle”). By surface analysis, zone + -ule. Doublet of zonula.

Adapted from the Wiktionary entry zonule (CC BY-SA 4.0).

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