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|Noun||1.||subphylum Urochorda - tunicates |
tunicate, urochord, urochordate - primitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larva
class Thaliacea, Thaliacea - small class of free-swimming tunicates; sometimes classified as an order
phylum - (biology) the major taxonomic group of animals and plants; contains classes