Definition of "opticon" [opticon]

• The first of the three ganglionic swellings in the optic tract of an insect's brain. (noun)

The Century Dictionary (Public Domain)

• "The uniqueness of the Panopticon is that it allows security to observe (- opticon) all (pan -) the prisoners at once, without the prisoners being able to tell if they are being watched."
• "However, eight syllables are a mouthful; how about opticonductor, or shorter still, crossing the opticon?"
• "Periopticon: third ganglionic swelling of optic tract: see opticon."