bit·ter 'bit-ər adj being or inducing the one of the four basic taste sensations that is peculiarly acrid, astringent, or disagreeable and suggestive of an infusion of hops compare SALT (2), SOUR, SWEET
bit·ter·ness n
* * *
bit·ter (bitґər) having an unpalatable taste, such as that of quinine.Medical dictionary. 2011.