The story
From Ancient Greek λισσός (lissós, “smooth”) + encephal- (“brain”) + -y, from Ancient Greek ἐν (en, “in”) + κεφαλή (kephalḗ, “head”).
Etymology from Wiktionary, CC BY-SA 4.0.
lissencephaly
Today it means: The condition of having a smooth appearance on the surface of the brain. Full definition →