| a combining form meaning “bud, sprout,” “embryo,” “formative cells or cell layer,” used in the formation of compound words: blastosphere. |
| blasto- or blast- pref. Bud; germ; budding; germination: blastocyst. [From Greek blastos, bud.] |
blasto- or blast-
pref.
Bud; germ; budding; germination: blastocyst.