culture medium
noun [ C ] biology specialized uk/ˈkʌl.tʃə ˌmiː.di.əm/ us/ˈkʌl.tʃɚ ˌmiː.di.əm/ culture media /ˈkʌl.tʃə ˌmiː.di.ə/ /ˈkʌl.tʃɚ ˌmiː.di.ə/
培养基（一种营养液，用于在实验室里培养细胞或微生物）
a substance containing nutrients in which cells or microorganisms can be grown
See also: medium noun