fossil
1. fos.sil \'fa:s-*l\ n [L fossilis dug up, fr. fossus, pp. of fodere to dig - more] at BED 1: any remains, impression, or trace of an animal or plant of past geologic al ages that has been preserved in the earth's crust 2a: a person whose views are outmoded : FOGY 2b: something that has become rigidly fixed 3: an old word or word element preserved only by idiom (as fro in to and fro) 2. fossil aj 1: extracted from the earth {~ fuels such as coal} 2: being or resembling a fossil