placoid /'plækɒid/ 📖 中文释义 a. (鱼鳞)板状的, 盾鳞状的n. 有盾鳞的鱼 📘 English Definition(英文释义) s. as the hard flattened scales of e.g. sharks ← placodont P 字母词表 Placothuriidae →