Noah Webster's Dictionary (n.) One who thins, or makes thinner.

Multi-Version Concordance Thinner (1 Occurrence) 2 Samuel 13:4 And he said to him, O son of the king, why are you getting thinner day by day? will you not say what your trouble is? And Amnon said to him, I am in love with Tamar, my brother Absalom's sister. (BBE DBY)