Definition of blue coral
: a massive coral (Heliopora coerulea) with a lamellated calcareous skeleton colored blue by iron salts that is widely distributed in the Indian and southwest Pacific oceans and is the sole recent form of a once abundant order (Coenothecalia)
Love words? Need even more definitions?Merriam-Webster unabridged
Words at Play
Ask the Editors
- On Contractions of Multiple Words
- A Look at Uncommon Onomatopoeia
- Is Singular 'They' a Better Choice?