RhymeZone: blastoid definitions

Definitions of blastoid:

noun: (paleontology) A member of an extinct class of echinoderms, the Blastoidea.
noun: (medicine) A blastocyst grown in-vitro.
adjective: (paleontology) Of or relating to blastoids.
adjective: (medicine) Synonym of blastic

(Definitions from Wiktionary)