How a second-century rhetorician’s dictionary became an essential tool for modern anatomy

Ideas & Philosophy · Published 3 October 2026 Swipe more like this →

In short: Julius Pollux was a Greek scholar whose ten-book thesaurus, the Onomasticon, was designed to help orators master classical vocabulary. While his own speeches are lost to history, his catalog of synonyms became a vital resource for Renaissance scholars and anatomists, who used his obscure Greek terms to name body parts.

Julius Pollux, a scholar from Naucratis in Roman Egypt, rose to prominence in the 2nd century AD. His reputation was such that Emperor Commodus appointed him to a prestigious chair of rhetoric at the Academy in Athens. According to the writer Philostratus, this appointment was largely due to the scholar’s melodious voice, though not everyone was impressed. The satirist Lucian likely targeted Pollux in his work Lexiphanes, mocking him as an ignorant orator who relied on affectation and obscure vocabulary to build a reputation.

Pollux’s primary legacy is the Onomasticon, a ten-book Greek thesaurus that served as a cornerstone of the Atticist movement. Unlike modern dictionaries, it was organized by subject matter rather than alphabetically. While Pollux claimed the arrangement was random, modern researchers suggest the structure reflects the complex social paradigms of the Roman-Greek world. He was a notably inclusive lexicographer, drawing from classical authors, New Comedy, Hellenistic historiography, and even contemporary spoken Greek to provide a comprehensive toolkit for the accomplished orator.

The work’s influence endured long after the decline of the Second Sophistic. Because Pollux frequently quoted fragments from otherwise lost ancient texts, his dictionary became an invaluable reference for 19th-century scholars like William Smith. Its reach extended into the sciences as well; after Rudolf Gwalther published a Latin translation in 1541, Renaissance anatomists turned to the Onomasticon to find precise, obscure Greek terms for human anatomy. Today, the text remains a critical window into the daily life, politics, and theater of classical antiquity, preserved through centuries of editions from Aldus Manutius to modern scholarly collections.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?

Related

• How a Stoic philosopher used creative etymology to decode the ancient Greek gods
• The word thesaurus originally meant a treasure house, not a book of synonyms.
• Socrates joked he could not afford Prodicus's fifty-drachma lecture on the right word
• Demosthenes shaved half his head so he could not skip speech practice
• The ancient scholar who invented blood libel and claimed he summoned Homer's ghost
• The pagan philosophy student who shopped around schools before choosing Christianity
• A fever convinced an 18th-century doctor that thought is made of flesh
• Was this 16th-century philosopher the architect of the modern European state?
• Why did a French philosopher warn that intellectuals were betraying their core purpose?
• Why the founder of German conservatism would likely offend modern free-market advocates
• The earliest English book known to be by a woman came from a sealed cell
• How a physician turned nationalist founded a movement to reshape Indian Hindu identity

More in Philosophers · More in Ideas & Philosophy · Latest · A–Z · All topics