conchoidal

a. 贝壳状的
【医】 甲状的, 甲介形的

副词:conchoidally 

con.choi.dal

adj.（形容词）
Of, relating to, or being a surface characterized by smooth, shell-like convexities and concavities, as on fractured obsidian.
贝壳状的：（属于）表面光滑且呈贝壳状凸凹特点的、或与之有关的，如黑曜石碎块

来源：
From Greek konkhoeidôs [mussellike]
源自 希腊语 konkhoeidôs [贝壳状的]
konkho- [concho-]
konkho- [前缀，表.贝类的.]
-eidôs, -oeidôs [-oid]
-eidôs, -oeidôs [后缀，表.贝形的.]

【引伸】
conchoi.dally
adv.（副词）