The Collaborative International Dictionary
Fucoidal
Fucoidal \Fu*coid"al\, a.
(Bot.) Fucoid.
(Geol.) Containing impressions of fossil fucoids or seaweeds; as, fucoidal sandstone.
Wiktionary
fucoidal
a. 1 (context botany English) fucoid 2 (context geology English) Containing impressions of fossil fucoids or seaweeds.