Dictionary.com
definitions
  • synonyms
British Dictionary definitions for robertson screw

Robertson screw

noun
  1. trademark a screw having a square hole in the head into which a screwdriver with a square point (Robertson screwdriver (trademark)) fits

Word Origin

C20: after its inventor P. L. Robertson (1896–1951), a Canadian industrialist
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012