cyclostome

n. 圆口类脊柱动物
a. 圆口动物的

形容词:cyclostomate 

cy.clo.stome

n.（名词）
Any of various primitive eellike vertebrates of the class Agnatha, such as a lamprey, lacking jaws and true teeth and having a circular, sucking mouth.
圆口纲脊椎动物：一种类似鳗鱼的无颚纲原始脊椎动物，如盲鳗，没有下颚和真正的牙齿，而长着圆形吮吸的嘴

来源：
From New Latin Cyclostomo
源自 现代拉丁语 Cyclostomo
Cyclostomata [class names]
Cyclostomata [纲名]
cyclo-
cyclo-
Greek stoma stomat- [mouth]
希腊语 stoma stomat- [嘴]

【引伸】
cyclos.tomate.