Webster's English Dictionary

Enter the word to look up:

pyroxene

py.rox.ene \pi--'ra:k-.se-n, p*-\ \.pi--.ra:k-'se-n-ik, p*-, -'sen-\ n [F 
   pyroxe'ne, fr. Gk pyr- + xenos stranger] : any of a group of 
   igneous-rock-forming silicate minerals that contain ca lcium, sodium, 
   magnesium, iron, or aluminum, usu. occur in short prismatic crystals or 
   massive, are often laminated, and vary in color from white to dark green or 
   black - py.rox.e.nic aj