/ˌdi:ˈnaɪtrɪfaɪ ||; diˈnaɪtrəˌfaɪ/verb [T] (present participle denitrifying third person singular present denitrifies;past tense past participle denitrified) (technical术语) to remove NITRATES or NITRITES from sth, especially from soil, air or water 使脱去硝酸盐或亚硝酸盐，使脱硝（尤指从土壤、空气或水中） ☞picture at nitrogen 见nitrogen插图 ➔denitrification /di:ˌnaɪtrɪfɪˈkeɪʃn ||; diˌnaɪtrɪfɪˈkeʃən/ noun [U]