[], (Adjective)

Definitions:
- Located or occurring beneath a shell.


Phrases:

Origin:
mid 19th century; earliest use found in Annals and Magazine of Natural History. From sub- + shell

[], (Noun)

Definitions:
- A shell that lies beneath another shell; a subsidiary layer within a shell.

- A set of allowed quantum states within a shell of an atom which can be occupied by electrons having the same value of the orbital quantum number l. Also: a corresponding set of allowed quantum states of nucleons in a nucleus.

- An instance of a shell initiated by another shell.


Phrases:

Origin:
mid 19th century; earliest use found in Annals and Magazine of Natural History. From sub- + shell