Useful english dictionary. 2012.
thumbkin — /thum kin/, n. thumbscrew (def. 2). Also, thumbikin /thum i kin/, thumbikins. [1675 85; THUMB + KIN] * * * … Universalium
thumbkin — /thum kin/, n. thumbscrew (def. 2). Also, thumbikin /thum i kin/, thumbikins. [1675 85; THUMB + KIN] … Useful english dictionary