PRONUNCIATION: (nok-tuh-LOO-suhnt)

MEANING: adjective: Shining at night.

ETYMOLOGY: From Latin nocti- (night) + lucent (shining). Ultimately from the Indo-European root leuk- (light), which also gave us lunar, lunatic, light, lightning, lucid, illuminate, illustrate, translucent, lux, lynx, pellucid, lutestring, lustrate, lucubrate, limn, and lea. Earliest documented use: 1691.

NOCTILUSCENT - the night is deepening

NOCTILU CANT - Prime Minister Noctilu of Roumania regrets he is unable

NON-TILUCENT - my bathroom walls do not glow