fucoid
adjective2
- Calcareous siltstone, Cambrian Fucoid Beds, earth.ox.ac.uk webpage The Fucoid beds are quite variable in appearance in composition […] The rock unit got its name from the early belief that these markings were the compressed remains of seaweeds (fucoids). Now it is thought that they are the trails left by feeding creatures on the sea floor.
noun1
forms
fucoids · more fucoid · most fucoid