Frederik Vilhelm August Meinert (1833, in Copenhagen – 1912), was a Danish arachnologist and editor of the first series of Entomologiske Meddelelser.
Meinert initially studied theology .
Later he was a pupil of Jørgen Matthias Christian Schiødte and he too became Inspektor at the Zoological Museum in Copenhagen.
Meinert specialised in comparative anatomy and histology mainly of Malacostraca and Pycnogonida .
Species named for him are Clypeoniscus meinerti Giard & Bonnier, 1895, Laothoes meinerti Boeck, 1871, Paralaophonte meinerti(Brady, 1899) and Neosarmatium meinerti(De Man).