What are silicones ?

Explanation

### Step-by-Step Solution:

**Step 1: Definition of Silicones**
Silicones are polymeric organosilicon compounds that contain Si-O-Si linkages. They can be described as a class of materials that have silicon atoms bonded to oxygen atoms and organic groups.

**Step 2: General Formula**
The general formula for silicones can be represented as R2SiO, where R represents organic groups (such as alkyl or aryl groups). This formula indicates that each silicon atom is bonded to two organic groups and one oxygen atom.

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