Main Entry: in·stinc·tive Pronunciation: in-'sti[ng](k)-tiv Function: adjective 1: of, relating to, or being instinct 2: derived from or prompted by instinct instinctive fear> —in·stinc·tive·lyadverb
Main Entry: in·stinc·tu·al Pronunciation: in-'sti[ng](k)-ch&(-w&)l, -'sti[ng](k)sh-w&l Function: adjective : of, relatingto, or based on instincts <instinctual behavior> instinctual society of social insects>