| 单词 | ascidian |
| 释义 | ascidian (once / 52068 pages) n WORD FAMILY ascidian: ascidians USAGE EXAMPLESAn egg does not come from a stone, and the ascidian did not come from a lifeless rock. Westbrook, Richard B., The Eliminator; or, Skeleton Keys t...(2012) Gregarines are essentially parasites of Invertebrates; they are not known to occur in any true Vertebrate although met with in Ascidians. Various, Encyclopaedia Britannica, 11th Edit...(2011) This animal seems to have been more like the larvæ of our existing marine Ascidians than any other known form. Darwin, Charles, The Descent of Man and Selection in...(2011) n minute sedentary marine invertebrate having a saclike body with siphons through which water enters and leaves Hypo|Hyper sea squirt ascidian that can contract its body and eject streams of water tunicate, urochord, urochordate primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva |
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