mīˈastə(r) noun
Usage: capitalized
Etymology: New Latin, from Greek miastōr one that defiles; akin to Greek miainein to defile
: a genus of flies (family Cecidomyiidae) that are remarkable for their parthenogenetic and paedogenetic reproduction by which the larva on hatching from the egg develops internally a brood of similar larvae that on escaping may repeat the process for several generations before pupation and development of mature individuals