
silicon or silicone
Silicon is a nonmetallic element (symbol Si) with an atomic number of 14 and atomic weight of 28.0855.
"An example of a nonmetallic element is Silicon."
Silicone is a chemical term meaning any class of inert or semi-inorganic polymeric compounds that has a wide array of thermal stability and extremely water repellent.
"The cyborg's prosthetic arm is made of silicone and other elements."
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