Term: somite fast muscle cell
Name: somite
Synonyms: somitic mesoderm
Definition: Undifferentiated mesodermal components of early trunk or tail segments or metameres, derived from paraxial mesoderm; forms myotomes, sclerotomes and perhaps dermatomes.
Ontology: Anatomy Ontology [ZFA:0000155]

Name: fast muscle cell
Synonyms: fast muscle fiber, white muscle cell
Definition: A muscle cell that has a fast contractile response. Fast muscle fibers make up the deep portion of the myotome and are also known as white muscle cells.
Ontology: Anatomy Ontology [ZFA:0009117]