Pollex may refer to: * The

thumb The thumb is the first digit of the hand, next to the index finger. When a person is standing in the medical anatomical position (where the palm is facing to the front), the thumb is the outermost digit. The Medical Latin English noun for thumb ...

* An Ancient Roman unit of measurement, equivalent to approximately 24.6 mm. See also:

Uncia (unit) The (plural: , lit. "''a twelfth''") was a Roman unit of length, weight, and volume. It survived as the Byzantine liquid ounce (, ''oungía'') and the origin of the English inch, ounce, and fluid ounce. The Roman inch was equal to of a Rom ...

* ''Pollex'', a genus of moths.