Osteoclast

Part of speech: noun

Definitions

1. A specialized cell in the skeletal system that breaks down bone tissue during the process of remodeling and is essential for maintaining calcium balance within the body
2. This particular type of cell facilitates the removal of bone material, playing a significant role in the ongoing process of bone metabolism and calcium regulation
3. A cell that dissolves and absorbs bone tissue as part of bone renewal and calcium homeostasis

Etymology: Bone is constantly being rebuilt, and the cell that does the demolition gets a name built from two Greek words for breaking and bone. "Osteoclast" combines "osteo-", from Greek "osteon" meaning "bone", with "-clast", from Greek "klastos" meaning "broken" or "broken in pieces", which comes from the verb "klan", to break. Note that "-clast" comes from a verb meaning "break", so the cell's name describes what it does rather than what it is made of. The pairing is a deliberate pattern in English scientific vocabulary. Words ending in "-clast" describe things that break something apart, and the same root gives "iconoclast", a person who breaks religious images, which is a useful way to remember the element.