A microcontinent in the Paleozoic era, crustal fragments of which underlie south-west Great Britain and the eastern coast of North America.

plural of carbonosome

(paleontology) A member of an extinct class of echinoderms, the Blastoidea. / (medicine) A blastocyst grown in-vitro.

(organic chemistry) Any of a group of oxacyclic diterpenes found in certain soft corals