In bone physiology, the<unk>  describes the temporal duration (i.e. lifespan) of the basic multicellular unit (BMU) that is responsible for bone turnover. Historically, this was referred to as the sigma (σ) or sigma<unk> , but the terminology is now outdated.
Bone remodeling period
Bone resorption
Pre-metastatic niche
Peak bone mass
Bone healing
Cancer dormancy
Follicular phase
Bone age