Protuberant/prəʊˈtuːbərənt/ Definition 1 of 2Pro Tip 1/3Physical Attributes Use for parts of the body or objects that physically stick out. The old tree had a protuberant root that everyone tripped over. Pro Tip 2/3Visible Difference Best used when something stands out clearly from its surroundings. His protuberant tattoo made him easily identifiable in the crowd. Pro Tip 3/3Not Always Negative Although unusual, it doesn't always imply something bad. She admired the protuberant design on the otherwise plain vase.