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A basestar (also known as a "baseship") is a capital Cylon warship that combines the functions of aircraft carrier and battleship. It is the primary adversary and counterpart of a Colonial battlestar.
- For information on the star-shaped Re-imagined Series version, see Basestar (RDM).
- For information on the saucer-shaped Original Series version, see Basestar (TOS).
- In the Original Series, the Colonial battlestar is also referred to as a "base ship". Likewise, basestars are also referred to as a "Cylon battlestar" (Saga of a Star World).