li|as

li|as «LY uhs», noun.

a compact blue limestone rock.

╂[< Old French liois, or liais, probably < lias, plural of lie lee² (because of its darkish color)]

Li|as «LY uhs», noun. Geology.

1. the earliest epoch of the European Jurassic system, characterized by clayey rocks with fossils.

2. the rocks of this epoch.

╂[< lias]