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Medical Definition of Phosphosphingosides
1. A group of phospholipids, found in brain, spinal cord, kidney, and egg yolk, containing 1-phosphocholine (choline O-phosphate) combined with a ceramide (a long-chain fatty acid linked to the nitrogen of a long-chain base, such as sphingosine). Synonym: ceramide 1-phosphorylcholine, phosphosphingosides. (05 Mar 2000)