Passover (biblical, Israelite, Jewish, or Christian Passover; this term also includes Quartodeciman Passover, observed on Nisan 14, especially by Christians in Asia Minor)

A progenitor cell that arises from mesenchymal stem cells in the bone marrow and has the ability to differentiate into an osteoblast or a chondrocyte.

Every time; always, without change.

Alternative form of deoxyhemoglobin