ascidian

/uh-sid-ee-uhn/US // əˈsɪd i ən //UK // (əˈsɪdɪən) //

蛔虫,蛔虫症,蛔虫病,蛔虫类

Definitions

n.名词 noun

1
- : any solitary or colonial tunicate of the class Ascidiacea, exhibiting in the larval stage the vertebrate characteristics of a notocord and hollow nerve cord.

adj.形容词 adjective

They pass through peculiar phases of development, the young ascidian appearing like a tadpole-body.
Castle77 observed and studied the phenomenon of self-sterility in an Ascidian, Ciona intestinalis, which is hermaphroditic.
Now this new organisation is not that of a branchial apparatus but represents a very small but complete ascidian (Fig. 13).
Appendicularia is a curious little Ascidian, differing from all the others in its possession of a tail.
He pointed out also that the "notochord" was confined to the tail of the ascidian larva.