单词	Larvacea
释义	Larvacea /lɑːˈveɪʃə / plural noun Zoology A class of minute transparent planktonic animals related to the sea squirts. They have a tadpole-like body which is typically enclosed in a gelatinous ‘house’ that is regularly shed and replaced.Within the urochordates, both genes placed Oikopleura (class Larvacea) as the sister group to all other urochordates. Derivatives larvacean adjective & noun ... Ascidians and thaliaceans (which, along with the larvaceans, comprise the subphylum Urochordata) display a biphasic life-history with morphologically dissimilar larval and adult body plans. This supposition is largely based on data which suggests that, within the urochordates, the directly developing larvaceans are most primitive and the other two chordate subphyla are exclusively directly developing. Other more sophisticated jelly creatures include some mollusks and snails, and tunicates - sea squirts, salps and larvaceans. Origin Modern Latin (plural), from larva.
随便看	prayerfulness prayer gong prayer group prayer mat prayer meeting prayer mill prayer niche prayer nut Prayer of Manasses prayer oil prayer plant prayer ring prayer rug prayer saying prayer scarf prayer shawl prayer stick prayer stool prayer thong prayer tower prayer-value prayer wall prayer wheel prayerwise praying band

英语词典包含243303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。