The Collaborative International Dictionary
Psarolite
Psarolite \Psar"o*lite\, n. [Gr. ? speckled + -lite.] (Paleon.) A silicified stem of tree fern, found in abundance in the Triassic sandstone.
Wiktionary
psarolite
n. (context paleontology English) A silicified stem of tree fern, found in abundance in the Triassic sandstone.