Amphioxi Amphionic • Amphioxidae · · · Info · Definitions · Synonyms · Characters · · Amphioxi · · Text Latin · · Script 8 · · Length Definitions · · · (noun) small translucent lancet-shaped burrowing marine animal; primitive forerunner of the vertebrates. Synonyms: lancelet, amphioxus. · · Noun Definition 1 Synonyms · · · lancelet · · Synonym 1 amphioxus · · Synonym 2 Characters · · A latin capital letter a U+0041 h latin small letter h U+0068 i latin small letter i U+0069 m latin small letter m U+006D o latin small letter o U+006F p latin small letter p U+0070 x latin small letter x U+0078