cyclostome /ˈsaɪkləˌstəʊm, ˈsɪk-/

• 1. 

  N any primitive aquatic jawless vertebrate of the class Cyclostomata, such as the lamprey and hagfish, having a round sucking mouth and pouchlike gills 圆口纲脊椎动物

• 2. 

  ADJ of, relating to, or belonging to the class Cyclostomata 圆口纲脊椎动物的; 和圆口纲脊椎动物有关的; 属于圆口纲脊椎动物的