聚甲醛 Traditional form: 聚甲醛 Pinyin (reading): jùjiǎquán Definitions: polyformaldehyde (CH2O)n Characters: 聚 - to assemble, to collect, to meet 甲 - armor, shell; fingernails; 1st heavenly stem 醛 - aldehyde Traditional characters: 聚 - to assemble, to collect, to meet 甲 - armor, shell; fingernails; 1st heavenly stem 醛 - aldehyde