(n.) The art, process, or occupation of making a lexicon or dictionary; the principles which are applied in making dictionaries.
Example Sentences:
(1) It is dangerous, to pinch an ugly word from trade union lexicography, for its "automaticity", the almost involuntary expectation that university is the right option simply because it's available.
Lexicology
Definition:
(n.) The science of the derivation and signification of words; that branch of learning which treats of the signification and application of words.