hypertrophy

This term carries a clinical and biological weight, shifting the focus from general growth to the specific enlargement of individual cellular components. It suggests a physiological adaptation to stress or demand, often associated with strength and power in a fitness context, but signaling pathology in a medical context. While growth describes any increase in size, this word implies a specific mechanism of expansion. It evokes an image of density and thickening rather than the creation of new cells, distinguishing it from hyperplasia where the number of cells increases.