nutshell
/ˈnʌtʃel/noun
1
- the hard woody covering around the kernel of a nut坚果壳。
2
nut shell
any of a number of bivalve molluscs occurring chiefly in cool seas, in particular（生存于冷海水中的）双壳类软体动物, 尤指：
2.1
- a small oval-shelled bivalve (genus Nuculana, family Nuculanidae)小椭圆形双壳类软体动物（吻状蛤属, 吻状蛤科）。
2.2
- a bivalve with a rectangular shell which is rounded at the front and angled behind (genus Nucula, family Nuculidae)（前圆后尖的）矩形双壳类软体动物（胡桃蛤属, 胡桃蛤科）。
短语
in a nutshell
- in the fewest possible words简单地（说）, 概括地（说）：
she put the matter in a nutshell.
她简单地介绍了一下事情的经过。