[agent-n. from THIN v.1: see -ER1.] One who thins.
1832. Planting, 63, in Libr. Usef. Knowl., Husb., III. Leaving them to press upon each other more severely than vigorous thinners would permit.
1889. Pall Mall G., 2 July, 2/2. The case of the little turnip-thinners in Saxony.
