请输入您要查询的英文单词:

 

单词 cercaria
释义

Definition of cercaria in English:

cercaria

nounPlural cercariaesəːˈkɛːrɪəˌsərˈkerēə
Zoology
  • A free-swimming larval stage in which a parasitic fluke passes from an intermediate host (typically a snail) to another intermediate host or to the final vertebrate host.

    〔动〕摇尾幼虫,尾蚴

    Example sentencesExamples
    • The larvae inside the snail host produce several thousands of cercariae.
    • Inside these slime balls are cercariae of the fluke, nicely encased in a ‘mini’ aquatic habitat, albeit a temporary one.
    • Once the cercaria enters the second intermediate host, it sheds its tail and becomes a metacercaria, which is little more than a miniature, but sexually immature, adult, that may, or may not, encyst.
    • Only the tadpoles that were exposed to cercariae developed deformities.
    • Tadpoles in ponds with snails pick up trematode larvae, called cercariae.

Origin

Mid 19th century: modern Latin, formed irregularly from Greek kerkos 'tail'.

Definition of cercaria in US English:

cercaria

nounˌsərˈkerēə
Zoology
  • A free-swimming larval stage in which a parasitic fluke passes from an intermediate host (typically a snail) to another intermediate host or to the final vertebrate host.

    〔动〕摇尾幼虫,尾蚴

    Example sentencesExamples
    • Only the tadpoles that were exposed to cercariae developed deformities.
    • Tadpoles in ponds with snails pick up trematode larvae, called cercariae.
    • Inside these slime balls are cercariae of the fluke, nicely encased in a ‘mini’ aquatic habitat, albeit a temporary one.
    • The larvae inside the snail host produce several thousands of cercariae.
    • Once the cercaria enters the second intermediate host, it sheds its tail and becomes a metacercaria, which is little more than a miniature, but sexually immature, adult, that may, or may not, encyst.

Origin

Mid 19th century: modern Latin, formed irregularly from Greek kerkos ‘tail’.

随便看

 

英汉双解词典包含464360条英汉词条,基本涵盖了全部常用单词的翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2022 Newdu.com All Rights Reserved
更新时间:2024/12/27 2:21:51