sə̇ˌfēnəˈmī(y)ə, ˌsefənōˈ- noun
Etymology: New Latin, from Greek kēphēn + New Latin -o- + -myia
1. capitalized : a genus of large gray-brown beelike botflies (family Oestridae) chiefly attacking the nostrils and pharyngeal cavity of members of the deer family and being among the fastest moving living things, reputedly attaining speeds in excess of 800 miles per hour
2. -s : any insect of the genus Cephenomyia