CARTILAGE, noun Gristle; a smooth, solid, elastic substance, softer than bone, of a pearly color and homogeneous texture, without cells or cavities. It is invested with a particular membrane called perichondrium, which in the articular cartilages, is a reflexion of the synovial membrane.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI