Blastos

Part of speech: noun

Definitions

1. An immature or undifferentiated cell in the process of development; a stage in the life cycle of a living organism characterized by early growth; a term often used in biological contexts to describe cells that have not yet reached full maturity
2. Referring to a precursor cell that has not yet transformed into a specialized cell type; indicating a phase in which cellular growth and differentiation occurs; typically associated with embryonic or regenerative biology
3. Describing a fundamental cellular unit in its formative state; relating to the early developmental stages of organisms as they grow and differentiate; commonly referenced in studies of tissue formation and regeneration

Etymology: In ancient Greek, "blastos" meant a sprout, bud, or shoot, the green growth that pushes out of a seed or stem. Its related verb, "blastanein," meant to sprout or germinate, so the core idea was something young emerging and beginning to grow. Biologists adopted this root as a combining form, and it now marks cells and tissues caught mid-development. A "blastula" is an early embryo, a hollow ball of cells, and an "osteoblast" is a cell that builds bone. The standalone noun is mostly used this way, as the last element of longer technical names. English "blast" in the sense of an explosion is an unrelated word. It comes from Old English "blæst," meaning a blowing or gust of wind, and has no connection to the Greek.

Synonyms: blastocysts, embryos