encyclopedist

noun

1. A member of a group of French authors who collaborated in the 18th century in the production of the Encyclopédie, under the direction of Denis Diderot.
2. An author of, or contributor to, an encyclopedia.

   “The root of the mallow in goat's milk excites the sexual urge, according to Pliny the Elder, the Roman encyclopedist of the first century A.D.”