hyaline cartilage

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun Semitransparent, opalescent cartilage with a blue tint, consisting of cells that synthesize a surrounding matrix of hyaluronic acid, collagen, and protein. It forms most of the fetal skeleton and is found in the trachea, larynx, and joint surfaces of the adult.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun translucent cartilage that is common in joints and the respiratory passages; forms most of the fetal skeleton