vivisectionist|vɪvɪˈsɛkʃənɪst| [f. as prec. + -ist.] One who practises or defends vivisection. 1879Ld. Shaftesbury Sp. Ho. Lords 15 July, The contradictions of vivisectionists were surprising.1887‘Edna Lyall’ Knight-Errant (1889) 133 Without a deep, living sympathy, the artist surely degenerates into a species of vivisectionist.