1. A type of white blood cell which can be easily stained with alkaline (basic) dyes. It has a nucleus with two lobes and it carries around substances like histamine.
  2. Any structure, cell, or other bodily object which stains easily with alkaline dyes.

From the BioTech Dictionary at http://biotech.icmb.utexas.edu/. For further information see the BioTech homenode.