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[mass noun] Any of a group of phospholipids present in cell membranes, especially in the brain.
- ‘The major cephalins are phosphatidylserine and phophatidylethanolamine.’
- ‘In this way a reaction product forms in which more than 95% of the cephalin originally present has been converted to acylcephalin.’
- ‘The three assessed commercial cephalins can be used in laboratorial routine for the lupus anticoagulant research.’
Late 19th century: from Greek kephalē brain + -in.
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