Synonym for syncytiotrophoblast ... The syncytial outer layer of the trophoblast; site of synthesis of human chorionic gonadotropin. ... See: trophoblast. ... Synonym: placental plasmodium, plasmodial trophoblast, plasmodiotrophoblast, syncytial trophoblast, syntrophoblast. ... Origin: syncytium + trophoblast ... (05 Mar 2000) ... Found on http://www.encyclo.co.uk/local/20973