| 单词 | 凸凹 |
| 释义 | 〔conchoidal〕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〔strain〕a superior strain of wheat; a smooth strain of bacteria.麦子的高级品系；细菌的无凸凹种类 |
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