From Greek 'elektron' (amber) — static electricity was discovered by rubbing amber, naming an entire science after tree resin.
Of, relating to, or operated by electricity; charged with or conducting electric current.
From New Latin ēlectricus (amber-like, producing static electricity when rubbed), coined by English physician William Gilbert in his 1600 treatise De Magnete from Greek ēlektron (amber, electrum). The ancient Greeks discovered that rubbing amber attracted feathers and light objects — the first recorded observation of static electricity. The Greek ēlektron is of obscure pre-Greek origin but
Every word beginning with 'electr-' — electricity, electron, electrode, electronics — traces back to the Ancient Greek word for amber, because around 600 BCE Thales of Miletus noticed that rubbing amber with fur made it attract feathers and straw. The entire field of electrical science is named after a piece of fossilized tree resin.