Lexicographer

lexicographer \ˌlek-sə-ˈkä-grə-fər\ noun: an author or editor of a dictionary

Etymology: Late Greek lexikographos, from lexikon (from neuter of lexikos of words, from Greek lexis word, speech, from legein to say) + Greek -graphos writer (from graphein to write)

“Dictionaries are like watches; the worst is better than none, and the best cannot be expected to go quite true.” – Samuel Johnson (quoted in The Secret Life of Words by Henry Hitchings)