a hard, transparent material, used to make windows, bottles, and other objects:

(a)  

a chemical element that is a valuable, shiny, yellow metal used to make coins and jewellery:

(a)  

a chemical element, such as iron or gold, or a mixture of such elements, such as steel, that is generally hard and strong, and through which electricity and heat can travel:

(a)  

an artificial substance that can be shaped when soft into many different forms and has many different uses:

(a)  

a chemical element that is a valuable shiny, white metal, used for making cutlery (= knives, spoons, etc.), jewelry, coins, and decorative objects:

(a)  

a hard substance that forms the branches and trunks of trees and can be used as a building material, for making things, or as a fuel:

(a)  

the soft, curly hair from sheep, or thread or cloth made from this:

(a)  

thin, flat material made from crushed wood or cloth, used for writing, printing, or drawing on:

(a)