Chinese edit

 
former; original; primary
former; original; primary; raw; level; cause; source
mouth; (a measure word, for people, livestock or utensils) animal; creature; moving thing
trad. (原口動物) 動物
simp. (原口动物) 动物
 
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Noun edit

原口動物

  1. (biology) protostome, protostomian