from The American Heritage® Dictionary of the English Language, 4th Edition
- suffix An immature, embryonic stage in the development of cells or tissues: erythroblast.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- suffix an immature cell or tissue
from the GNU version of the Collaborative International Dictionary of English
- A suffix or terminal formative, used principally in biological terms, and signifying growth, formation
From Greek blastos, bud.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek βλαστός (blastos, "germ, sprout"). (Wiktionary)