amniocentesis amnioallantoic • amniochorial · · · Info · Definitions · Synonyms · Characters · · amniocentesis · · Text Latin · · Script 13 · · Length 5 · · Syllables Definitions · · · (noun) (pregnancy) extraction by centesis of amniotic fluid from a pregnant woman (after the 15th week of pregnancy) to aid in the diagnosis of fetal abnormalities. Synonyms: amnio. · · Noun Definition 1 Synonyms · · · amnio · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074