| 单词 | ammonoid |
| 释义 | ammonoid[ am-uh-noid ] / ˈæm əˌnɔɪd / nounany cephalopod mollusk of the extinct order Ammonoidea, from the Devonian to the Cretaceous periods, having a coiled, chambered shell. Origin of ammonoid1880–85; <New Latin Ammonoidea, equivalent to Ammon(ites) name of the order + -oidea-oidea; see ammonite2 Words nearby ammonoidammonium sulphate, ammonium thiocyanate, ammonium thiosulfate, ammoniuria, ammono, ammonoid, ammonolysis, ammonolyze, Ammons, Ammon's horn, ammophilous Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Scientific definitions for ammonoidammonoid [ ăm′ə-noid′ ] Any of various extinct cephalopods of the subclass Ammonoidea living from the Devonian to the Cretaceous Periods. Ammonoids had a symmetrical, coiled, chambered shell with angular sutures between the chambers. They are closely related to the nautiloids, including the modern-day chambered nautilus. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. |
| 随便看 |
英语词典包含192737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。