any of two classes (Hepaticopsida and Anthocerotopsida) of bryophytes, often forming dense, green, mosslike mats on logs, rocks, or soil in moist places
See liverwort in American Heritage Dictionary 4
(lĭvˈər-wûrtˌ, -wôrtˌ)
noun
Any of numerous small, green, nonvascular plants of the division Marchantiophyta, growing in moist environments and consisting of either a leafy mosslike structure or a flat thallus that is often lobed.