sphingosine
Concise Oxford English Dictionary © 2008 Oxford University Press:
sphingosine /ˈsfɪŋgə(ʊ)sʌɪn/
▶noun Biochemistry a basic compound which is a constituent of a number of substances important in the metabolism of nerve cells, especially sphingomyelins.
– origin C19: from Gk Sphing-, Sphinx ‘sphinx’, with ref. to the enigmatic nature of the compound.
'sphingosine' also found in these Oxford entries:

