NUTSHELL
nutshell
(noun) the shell around the kernel of a nut
Source: WordNet® 3.1
Etymology
Noun
nutshell (plural nutshells)
The shell that surrounds the kernel of a nut.
A short book summarizing an area of law.
Verb
nutshell (third-person singular simple present nutshells, present participle nutshelling, simple past and past participle nutshelled)
(transitive) To summarize (from the term in a nutshell).
Source: Wiktionary
Nut"shell`, n.
1. The shell or hard external covering in which the kernel of a nut
is inclosed.
2. Hence, a thing of little compass, or of little value.
3. (Zoöl.)
Definition: A shell of the genus Nucula. To be, or lie, in a nutshell, to
be within a small compass; to admit of very brief or simple
determination or statement. "The remedy lay in a nutshell." Macaulay.
Source: Webster’s Unabridged Dictionary 1913 Edition