ˌ ̷ ̷ ̷ ̷ˈ ̷ ̷nēən noun
Etymology: New Latin, from lith- + Greek thamn os bush + -ion (diminutive suffix)
1. capitalized : a genus of crustose reef-forming red algae (family Corallinaceae) that are abundant in post-Jurassic geologic strata and are represented by numerous recent forms growing chiefly on rocks and other algae
2. -s : any plant of the genus Lithothamnion