n.
Pronunciation: ' nep- ˌ tün, - ˌ tyün
Function: noun
Etymology: Latin Neptunus
Date: 14th century
1 a : the Roman god of the sea ― compare POSEIDON b : OCEAN
2 : the planet eighth in order from the sun ― see PLANET table
– Nep · tu · ni · an \ nep- ' tü-n ē - ə n, - ' tyü- \ adjective