ˈnepˌt(y)ün sometimes -pˌchün noun
( -s )
Etymology: after Neptune, Roman god of waters, from Latin Neptunus
1. usually capitalized : ocean , sea
full often hath she … sat with me on Neptune's yellow sands — Shakespeare
2. : a copper or brass plate or pan used in trade with the natives of Africa
3. or neptune green often capitalized N : a light to moderate green that is bluer and stronger than surf green