Used when discussing bones or growth in living creatures, especially in biology and medicine.

Biological Context

Often appears in scientific or educational materials, not everyday conversation.

Technical Term

Refers to two main types: endochondral (inside cartilage) and intramembranous (inside membranes).

Used metaphorically to describe things that have become fixed and unchangeable.

Implies something negative, like lack of progress or innovation.

Often related to organizations, policies, or routines that are seen as outdated.