zonulen.
/ˈzəʊnjuːl/ Anatomy.
1. A little zone: applied spec. to the ring-shaped fibrous structure which forms the suspensory ligament of the crystalline lens ( zonule of Zinn).
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the world > life > the body > sense organ > sight organ > parts of sight organ > [noun] > other parts
whitec1390
crystalline humoura1398
crystalloida1398
crystalline?a1425
eyeball1575
eyeglassa1616
crystalline lens1654
crystal1657
lens1719
membranula1821
zonule1828
angle1830
disc1861
1828 R. Knox tr. H. Cloquet Syst. Human Anat. 552 The author has omitted to describe the zonule of Zinn, or rather,..he has totally mistaken the connection between the coloured and colourless parts of the eye.
1854 Kölliker Hum. Histol. 390 The zonula is a thin transparent..membrane, stretching from the ora serrata retinæ as far as the border of the lens.
1873 H. Power tr. Stricker's Man. Histol. III. 354 The zonula-fibres arise from the substance of the vitreous behind the ora serrata.
2. Geology. (See quot. 1928.)
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1928 C. L. Fenton & M. A. Fenton in Amer. Naturalist 11 21 We have discussed the need for some term to designate the rocks bearing a faunule with several stratigraphers. In the course of one conversation Dr. Weller suggested ‘zonule’, and it has been approved by others... We propose the term, therefore, with the following definition: A zonule is the stratum or strata which contain a faunule, its thickness and area being limited by the vertical and horizontal range of that faunule.
1958 Bull. Geol. Soc. Amer. 69 113/1 A zonule is a biostratigraphic unit that is recognizable in a sedimentary basin or similar restricted area of sedimentation.
1976 BMR Jrnl. Austral. Geol. & Geophysics 1 109 The assemblage can be referred to the middle Eocene Proteacidites confragosus Zonule on the basis of the presence of the nominate species.
This entry has not yet been fully updated (first published 1921; most recently modified version published online December 2020).
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n.1828