大洋

ocean / (old) silver dollar

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)

ocean / vast / foreign / silver dollar or coin

Oceania

mid-ocean ridge (geology)

oceanic crust (geology)

halisaurus

Panthalassis (geology)

Southern Ocean