X字開頭的單詞或詞組
xylene trichloridexylenesulfonatexylylenediaminexerophthalmia superficialisxyloascorbic acidxylosidexanthoplastyxanthylic-nucleic acidxxxanthine nucleotidexanthoxyli fructusxiphodidymusxylene disulfonic acidxanthoproteie acidxixxixanthopterinexeroprintingxixxonxxiixaxerusxchromosomexisxenxcxanaduxiphiasxmaxmmx-linkedxivxiiixiexvixylenesulfonic acidxemex-linked recessivexystusxorxhosa