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A fictional plant that is able to move around and kill people with a poisonous stinger.
‘Triffid’ was coined by science fiction writer John Wyndham in his novel, The Day of the Triffids. The word probably comes from ‘trifid,’ divided into three parts, says the Oxford English Dictionary, since ‘the plant was supported on ‘three bluntly-tapered projections extending from the lower part’ of the body.’