cyclostomous

adj.(=cyclostomatous)有圆口的,圆口动物的

无颚脊椎动物的；一种由环口动物类组成的

形容词

1. The lamprey is a cyclostomous fish that lacks jaws.
海丽鱼是一种无颚脊椎动物，它没有颚部。

2. The classification of cyclostomous animals has been a topic of debate among scientists.
环口动物类的分类一直是科学家们争论的话题。