词根词缀：foss-, fossili-, fossil-, fossor-

【来源及含义】Latin: to dig, digging; dug out, dug up from beneath the surface; ditch, trench

【同源单词】efossion, fossa vesicae biliaris, fossette, fossil, fossil city, fossil energy

词根词缀：ichno-, ichn-

【来源及含义】Greek: track, trace, footprint; pertaining to fossil footprints

【同源单词】ichneutic, ichnite, ichnocoenosis, ichnofauna, ichnoflora, ichnofossil