| 单词 | eye tube |
| 释义 | > as lemmaseye tube eye tube n. (a) the tube of the eyepiece in a telescope or microscope; (b) Zoology a tubular eye found in jumping spiders, containing a series of lenses and four layers of photoreceptors. ΚΠ 1768 N. Maskelyne Instr. Observ. Ensuing Transit Venus 7 A Mark may be made on the Eye Tube of the refracting Telescope, by which it may be always re-adjusted to the same Position after any Alteration. 1912 W. Patten Evol. Vertebr. & Their Kin viii. 148 The external opening of the forebrain vesicle and that of the parietal eye tube. 1979 J. Muirden Sidgwick's Amateur Astronomer's Handbk. (ed. 4) xiii. 190 To ensure that full illumination is obtained with the lowest powers, see that the whole objective is visible from the extreme edges of the eye-tube. 2012 S. Markle Jumping Spiders 18 When the eye of a jumping spider looks dark, the angle is straight down the eye tube to the retina. < as lemmas |
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