| 单词 | zonule |
| 释义 | zonule Anat.|ˈzəʊnjuːl|
Also in L. form zonula |ˈzəʊnjʊlə|.
[ad. mod.L. zōnula, dim. of L. zōna zone: see -ule.]
1. A little zone: applied spec. to the ring-shaped fibrous structure which forms the suspensory ligament of the crystalline lens (zonule of Zinn).
1831R. Knox Cloquet's Anat. 555 These membraneous folds, which collectively are called the zonule of Zinn, are vascular. 1854Kölliker Hum. Histol. 390 The zonula is a thin transparent..membrane, stretching from the ora serrata retinæ as far as the border of the lens. 1873Power tr. Stricker's Histol. III. 354 The zonula-fibres arise from the substance of the vitreous behind the ora serrata.
2. Geol. (See quot. 1928.)
1928C. L. & M. A. Fenton in Amer. Naturalist XI. 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. 1958Bull. Geol. Soc. Amer. LXIX. 113/1 A zonule is a biostratigraphic unit that is recognizable in a sedimentary basin or similar restricted area of sedimentation. 1976BMR Jrnl. Austral. Geol. & Geophysics I. 109 The assemblage can be referred to the middle Eocene Proteacidites confragosus Zonule on the basis of the presence of the nominate species. |
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