coralline

adj

1. Of, relating to or pertaining to or resembling red algae of the family Corallinaceae.

   “Drifting idly around a broad oceanic arc, the bottle collides softly with tens of thousands of pelagic plastics all colonized by hard-shelled organisms, including barnacles, coralline algae, foraminifera and bivalve molluscs.”

2. Of, pertaining to, or resembling the material coral.

   “The pigeon rocked itself backwards and forwards on the bough, swelling out its breast feathers and laying its coralline beak upon them.”

3. Describing rock formed from the skeletons of such algae.

noun

1. Any calcareous species of red algae of the family Corallinaceae.
2. An animal that resembles such a coral.