| 单词 | retinula |
| 释义 | retinula Biol.|rɛˈtɪnjʊlə|
Pl. -ulæ. Also anglicized as retinule |ˈrɛtɪnjuːl|.
[Diminutive, on L. types, of retina; coined in Ger. by H. Grenacher in Untersuchungen über das Arthropoden-Auge (1877) ii. 17.]
One of the pigmented cells from which, in certain compound eyes of Arthropods, the rhabdom arises. Also attrib. (appositively).
1878Bell tr. Gegenbaur's Comp. Anat. 264 The retinal cells which give rise to the rhabdom constitute a retinula. 1883Q. Jrnl. Microsc. Sci. XXIII. 186 What Grenacher has called, in the multicorneal eye of Insects and Crustaceans, a ‘retinula’. 1888Rolleston & Jackson Anim. Life 168 A basement membrane..separates the retinulae from the optic ganglion. 1924Glasgow Herald 31 May 4/2 The insect's compound eye..has its numerous lenses and retinules each wrapped up in a black mantle. 1978Nature 29 June 772/1 The Drosophila compound eye consists of about 700 ommatidia, each containing six peripheral and two central retinula cells (photo⁓receptors).
Hence reˈtinular a.; reˈtinulate a.
1883Q. Jrnl. Microsc. Sci. XXIII. 211 Retinulate, of an ommateum in which the nerve-end cells are segregated to form definite groups, or ‘retinulæ’. 1888Rolleston & Jackson Anim. Life 516 Scutigera has a retinulate ommateum. Ibid. 525 In Limulus the central eyes have groups of five retinular cells. |
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