fucoid

& 8. [Lat. fuc (us)=seaweed, and Gr. eidos=form, appearance.] IMG:content-0205.png:[blocks in formation] Geol.: The rendering of the name given in Sweden to sandstones with impre ions like those of seaweeds. Theylie at the base of the Cam brian strata. (Lyell: Student's Elements of Geol .)