coralline

adjective

1. composed of coral or having the structure of coral: coralline limestone.
2. corallike.
3. coral-colored; reddish-yellow; light yellowish-red; pinkish-yellow.

noun

4. any red algae impregnated with lime.
5. any of various corallike animals or calcareous algae.

adjective

1. Also: coralloid of, relating to, or resembling coral
2. of the colour of coral

noun

3. any of various red algae impregnated with calcium carbonate, esp any of the genus Corallina
4. any of various animals that resemble coral, such as certain sponges