- nutshell (n.)
[nutshell 词源字典]
- c. 1200, nute-scalen; see nut + shell (n.). Figurative use with reference to "great condensation" (1570s) supposedly originally is a reference to a copy of the "Iliad," mentioned by Pliny, which was so small it could fit into the shell of a nut.[nutshell etymology, nutshell origin, 英语词源]