from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An undifferentiated cell in the mesoderm of the vertebrate embryo that is a precursor of a muscle cell.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. an undifferentiated stem cell that develops into muscle tissue
from The Century Dictionary and Cyclopedia
- n. A cell which gives rise to muscular fibers; the formative cell-element of muscular tissue.
myo- + -blast (Wiktionary)