The USS Threnody was a Federation Starfleet scout starship of the 24th century.

Circa 2358, Cadet Tasha Yar undertook the Priam IV test, a Starfleet Academy training simulation, in which the USS Threnody was destroyed in an ion storm. Yar and two other cadets, Forbus and T'Pelak crash-landed on the Prime Directive–prohibited planet of Priam IV in an escape pod, though only Yar survived. (TNG novel: Survivors)

As this vessel has so far only appeared in a holodeck simulation, it might not necessarily be a "real" starship.