Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
quercētum (querquētum, Fest. s. v. querquetulanae, p. 261 Müll.), i, n. [quercus], an oak-wood, oak-forest, Varr. R. R. 1, 16: querceta laborant, Hor. C. 2, 9, 7; Fest. l. l.