Soma - a Greek word, meaning 'body'. Perhaps the only way you know this word is its use in 'psychosomatic'.

But the more important thing is the use of soma in the novel Brave New World, in which it is the drug given to the populace in order to keep them subdued. As subdued as perhaps one might be if one were to take Elan up on his offer of Death Sticks. Though I don't think Soma had nearly the same death rate.