Rosalind Venetia Lane Fox Pitt-Rivers FRS (4 March 1907 – 14 January 1990) was a British biochemist. She became the second president of the European Thyroid Association in 1971; she succeeded Jean Roche and was followed by Jack Gross in this position, all three names inextricably linked with the discovery of the thyroid hormone triiodothyronine (T3).