ganglia i think
The term dozen means a grouping of 12 and comes from the French term douzaine. This grouping term is perceived to be one of the earliest primitive groupings.
Grouping, or pairing.
The medical term for the study of the nerves is neurology.
taxonomy
A bag of nerves is a figurative term for a very nervous person.
Neuritis
monophyletic
Taxonomy(:
The term synapse is the site where two nerves come together.
Ionic does not fit.
Taxonomy is the science of grouping organisms by their structures and origins. The term is also used to refer to the scientific naming of organisms.
I think it is the Associative Property