Definitions for tachina flyˈtæk ə nə
Random House Webster's College Dictionary
tach′i•na fly`ˈtæk ə nə(n.)
any of numerous bristly flies of the family Tachinidae, the larvae of which are parasitic on other insects.
Origin of tachina fly:
1885–90; < NL Tachina < Gk tachinḗ, fem. of tachinós swift
bristly fly whose larvae live parasitically in caterpillars and other insects; important in control of noxious insects