D defs.my
Entry 3 senses Webster, 1913

Nutshell

/nŭt'-shĕlˌ/ · Nut·shell · IPA /ˈnʌt.ʃɛl/
01 n. The shell or hard external covering in which the kernel of a nut is inclosed.
  1. 1.
    The shell or hard external covering in which the kernel of a nut is inclosed.
  2. 2.
    Hence, a thing of little compass, or of little value.
  3. 3.
    A shell of the genus Nucula.(Zool.)