When referring to movies, Morpheus was a character in 'The Matrix'. Have a look here if you wish to look more on that:
http://en.wikipedia.org/wiki/Morpheus_(The_Matrix)
Though, if you're talking about the Greek God then:
Morpheus was the god of dreams in Greek mythology. According to some ancient sources - such as the Roman poet Ovid - he was the son of Hypnos, the god of Sleep. Morpheus briefly appears in Ovid's Metamorphoses: "King Sleep was father of a thousand sons -
indeed a tribe - and of them all, the one
he chose was Morpheus, who had such skill
in miming any human form at will.
No other Dream can match his artistry
in counterfeiting men: their voice, their gait,
their face - their moods; and, too, he imitates
their dress precisely and the words they use
most frequently. But he mimes only men..." Ovid therefore suggests that Morpheus only sends images of humans in dreams or visions, while his brothers Phobetor and Phantasos are in charge of depicting dream images of animals and inanimate objects. Together these three sons of Sleep - Morpheus, Phobetor, and Phantasos - rule the realm of dreams.
Morpheus - Greek god of dreams. "In the arms of Morpheus" means to be asleep. on Howrse it means to be asleep whal you age!!!To be dreaming
Morpheus the god of sleep. In his arms your sleep is deep and sweet.
Morphine comes from the greek word Morpheus which is the God of dreams, it is named this due to its narcotic effects
I think what you are asking is "what is the Greek mythological origin for Morphine". The name "morphine" is rooted in the Greek personification of the dream state, Morpheus. His name means "shaper" as he was the shaper of dreams.
Morpheus The word morphine derives from the god's name
Morpheus is the god of dreams.
'Morphine' came from the name of the god of dreams, Morpheus.
Morpheus - album - was created in 1989.
Morpheus - software - was created in 2001.
Morpheus Road was created in 2010.
Morpheus's 2 younger brothers are Icelus and Phantasos
The Greek god of dreams was Morpheus. He was the son of Hypnos (sleep) and Pasithea (a grace). Morpheus has the abilty to be able to take any human's form when he goes into a dream. His symbol is the poppy.