| 单词 | fossil screw |
| 释义 | > as lemmasfossil screw fossil screw n. now rare any of various invertebrate fossils having a spiral or furrowed cylindrical structure, such as a gastropod columella or the stalk of a crinoid or sponge. ΚΠ 1838 C. Lyell Elements Geol. iv. 80 Thus a cast such as a, Fig. 54., commonly called a fossil screw, would never be suspected by an inexperienced conchologist to be the internal shape of the fossil univalve. 1912 C. S. Prosser Devonian & Mississippian Formations Northeastern Ohio iv. 331 What Mr. Lampson called a ‘fossil screw’ was found in the second sandstone from the top, probably a specimen of a Dictyophyton. 1951 G. W. Himus & G. S. Sweeting Elem. Field Geol. ii. xv. 200 Lengths of fossil crinoid stems are sometimes described by quarrymen as fossil screws. < as lemmas |
| 随便看 |
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。