Ichthyological English-Chinese Glossary
Term Defination　
annulus In ichthyology, a ring or rings on a fish scale or in a bony or cartilaginous structure corresponding to a year of growth. In a scale usually constists of closely arranged ridges (circuli). An accessory annulus is a ring caused by retarded or temporarily terminated growth that does not represent an annual cycle. In the tropics annuli may indicate spawning rather than growth. 　
輪 在許多溫帶的魚種中，其硬骨，鱗片與耳石的剖面具有的環狀構造。 　
※Chinese was translated from english by machine。