Quaternion (disambiguation)

Quaternion (from Latin quaternio 'fourness') stands for:

• in mathematics a range of numbers that is often used to represent rotations, see quaternion
• a pictorial system of order of the early modern imperial constitution, see Quaternions of the imperial constitution
• Quaternio, a layer of four sheets of parchment as one of the most common formats of antique bookbinding (multi-layer codices), see Codex # The multi-layer codex

This is a disambiguation page for differentiating between several terms identified with the same word.