electroencephalography (English)

Where does "electroencephalography" come from?

Electroencephalography is a compound term constructed from classical roots, blending "electro-" (derived from the Greek word for amber, ḗlektron), "encephalo-" (meaning "in the head"), and the suffix "-graphy," which denotes the process of recording. The term traces its components back to Ancient Greek, where en-kephalos described the brain as that which resides within the head. Together, these roots create a precise technical label for the medical practice of recording electrical activity originating from within the skull.

Full etymology tree

• electroencephalography (English), 'The measurement and recording of electrical activity in the brain for diagnostic purposes.'
  • compound electro- (English), 'Combining form of electricity.'
    • inherited ἤλεκτρον (ḗlektron) (Ancient Greek), 'amber'
  • compound encephalo- (English), 'Pertaining to the brain.'
    • inherited ἐγκέφαλος (enképhalos) (Ancient Greek), 'inside the head'
      • derived ἐν- (en-) (Ancient Greek), 'in-'
        • inherited *h₁én (Proto-Indo-European), 'in'
      • derived κεφαλή (kephalḗ) (Ancient Greek), 'head'
        • inherited *gʰebʰ-l̥ (Proto-Indo-European)
  • compound -graphy (English), 'Something written or otherwise represented in the specified manner, or about a specified subject.'
    • inherited -γραφία (-graphía) (Ancient Greek), 'writing, drawing'
      • derived γρᾰφή (graphḗ) (Ancient Greek)
        • deverbal γρᾰ́φω (gráphō) (Ancient Greek)

Direct ancestors

• electro- (English)
• encephalo- (English)
• -graphy (English)

Updated June 2026

Etymology data from Wiktionary, CC BY-SA 4.0 · About Miraris