Also found in: Thesaurus.
(Zoology) the notochord of a larval tunicate, typically confined to the tail region
(Animals) Also: urochordate another word for tunicate
[C19: from uro-2 + chord, a variant of cord]
a notochord that is chiefly confined to the tail region, present in the larval stage of tunicates.
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|Noun||1.||urochord - primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva|
chordate - any animal of the phylum Chordata having a notochord or spinal column
subphylum Tunicata, subphylum Urochorda, subphylum Urochordata, Tunicata, Urochorda, Urochordata - tunicates
ascidian - minute sedentary marine invertebrate having a saclike body with siphons through which water enters and leaves
doliolum - free-swimming oceanic tunicate with a barrel-shaped transparent body
larvacean - any member of the class Larvacea
appendicularia - free-swimming tadpole-shaped pelagic tunicate resembling larvae of other tunicates
|2.||urochord - a notochord of a larval tunicate typically confined to the caudal region|
notochord - a flexible rodlike structure that forms the supporting axis of the body in the lowest chordates and lowest vertebrates and in embryos of higher vertebrates