TACHINID

[tach.i.nid] n [NL Tachinidae, fr. Tachina, genus of flies, fr. Gk tachinos fleet, fr. tachys swift] (1888): any of a family (Tachinidae) of bristly usu. grayish or black dipteran flies whose parasitic larvae are often used in the biological control of insect pests -- tachinid adj