请输入您要查询的英文单词:

 

单词 pleopod
释义

Definition of pleopod in English:

pleopod

noun ˈpliːə(ʊ)pɒdˈplēəˌpäd
Zoology
  • A forked swimming limb of a crustacean, five pairs of which are typically attached to the abdomen.

    〔动〕腹肢,腹足,游泳足。亦称SWIMMERET

    Also called swimmeret
    Example sentencesExamples
    • The eggs can be kept in open brood pouches or attached to the pleopods of the female, as in pleocyematan decapods, or freely released in the environment, as in penaeid shrimps.
    • Sex determination was based on the morphology of the first pleopod and brood pouch if present.
    • Occasional specimens show preservation of delicate structures such as pleopods and antennae/antennules.
    • Often, a biologist need only examine the pleopods to make a family-level designation, thus making the dorsal carapace features superfluous in the diagnosis.
    • In contrast, arthropods such as the lobster possess distinct maxillipeds, pereopods, pleopods, and uropod.

Origin

Mid 19th century: from Greek plein 'swim, sail' + pous, pod- 'foot'.

Definition of pleopod in US English:

pleopod

nounˈplēəˌpäd
Zoology
  • A forked swimming limb of a crustacean, five pairs of which are typically attached to the abdomen.

    〔动〕腹肢,腹足,游泳足。亦称SWIMMERET

    Also called swimmeret
    Example sentencesExamples
    • Sex determination was based on the morphology of the first pleopod and brood pouch if present.
    • The eggs can be kept in open brood pouches or attached to the pleopods of the female, as in pleocyematan decapods, or freely released in the environment, as in penaeid shrimps.
    • Often, a biologist need only examine the pleopods to make a family-level designation, thus making the dorsal carapace features superfluous in the diagnosis.
    • Occasional specimens show preservation of delicate structures such as pleopods and antennae/antennules.
    • In contrast, arthropods such as the lobster possess distinct maxillipeds, pereopods, pleopods, and uropod.

Origin

Mid 19th century: from Greek plein ‘swim, sail’ + pous, pod- ‘foot’.

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:2024/12/26 22:53:43