wind pollination      
noun [ U ]  biology specialized uk/ˈwɪnd ˌpɒl.ə.neɪ.ʃən/ us/ˈwɪnd ˌpɑː.lə.neɪ.ʃən/
 风媒授粉
the process in which the wind carries pollen (= powder produced by male part of flower) from one plant to another which is then fertilized