Felis silvestris fe·lis·sil·vestris uncommon noun 1. bushy-tailed European wildcat resembling the domestic tabby and regarded as the ancestor of the domestic cat SynonymsEuropean wildcatcatamountainFelis silvestris Related words Broader terms wildcat Parts Felis WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.