David Graham Lloyd (20 June 1937 – 30 May 2006) was an evolutionary biologist and the seventh New Zealander to be elected as a fellow of the Royal Society in London. He did pioneering work in the field of plant reproduction. In December 1992, Lloyd fell victim to an apparent poisoning by acrylamide, a common laboratory chemical. As a result, he lay in a coma for three months and was left blind, mute, and quadriplegic. His former partner and fellow molecular biologist was tried twice for his attempted murder. The first trial ended with a hung jury and the second acquitted her.