单词 | pentameroid |
释义 | pentameroidadj.n. Palaeontology. A. adj. Of or relating to the extinct superfamily Pentameroidea or family Pentameridae of articulate brachiopods having roughly pentagonal shells, known from fossils of Ordovician to Devonian age. ΚΠ 1875 Amer. Cycl. XII. 812/1 The pentameroid forms begin in the Trenton and disappear in the Devonian. 1986 Canad. Jrnl. Earth Sci. 23 1438/2 He has observed well-preserved specimens belonging to most of the pentameroid genera. B. n. A pentameroid brachiopod. ΚΠ 1890 Cent. Dict. 4379/3 Pentameroid, a brachiopod of the family Pentameridæ. 1961 J. Stubblefield Davies's Introd. Palaeontol. (ed. 3) i. 24 Pentameroids, a group of brachiopods which migrated in force into the British area at the opening of the Silurian period. 1979 Paleobiology 5 139/1 A greater percentage of short-lived, reef-associated genera among the pentameroids would account for the comparatively low MGL [mean generic longevity] value relative to the orthids, spiriferids and strophomenids. This entry has been updated (OED Third Edition, September 2005; most recently modified version published online March 2022). < adj.n.1875 |
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。