Poseidon pose • Poseidonian · · · Info · Definitions · Characters · · Poseidon · · Text Latin · · Script 8 · · Length Definitions · · · (noun) (Greek mythology) the god of the sea and earthquakes in ancient mythology; brother of Zeus and Hades and Hera; identified with Roman Neptune. · · Noun Definition 1 Characters · · P latin capital letter p U+0050 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073