pin-eyed adj (Botany) (of flowers, esp primulas) having the stigma in the mouth of the corolla, on the end of a long style with the stamens lower in the tube. Compare thrum-eyed Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014