A structure that resembles a costa or rib; especially (in a coral) a small projection from a septum into the interseptal space.
Late 19th century; earliest use found in Quarterly Journal of the Geological Society of London.
英汉双解词典包含464360条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。