Acacia nilotica (gum arabic tree,babul, Egyptian thorn, Sant tree, Al-sant or prickly acacia; called thorn mimosa in Australia; lekkerruikpeul or scented thorn in South Africa) is a species of Acacia (wattle) native to Africa and the Indian subcontinent. It is also currently an invasive species of significant concern in Australia.

The generic name of this plant derives from ακακία (akakia), the name given by early Greek botanist-physician Pedanius Dioscorides (ca. 40-90) to this tree as a medicinal, in his book Materia Medica. This name derives from the Greek word for its characteristic thorns, ακις (akis, thorn). The species name nilotica was given by Linnaeus from this tree's best-known range along the Nile river.

The plant A. nilotica then, in turn, became the type species for the Linnaean Acacia genus (not all of which have thorns, even though they are named for them). For the ongoing reclassification of this and other species historically classified under genus Acacia, see the list of Acacia species.

Vivek Oberoi (born 3 September 1976) is an Indian actor. He is the son of Bollywood actor Suresh Oberoi and Yashodhara Oberoi.

Born to a Punjabi father and a Tamil mother, Vivek attended Mayo college in Ajmer. At an actors' workshop in London he was spotted by the director of New York University who took Vivek off to New York, where he completed his Masters Degree in film acting. Vivek also worked as a script writer in India.

Vivek Oberoi made his debut with Ram Gopal Varma's film Company. He received Filmfare Awards for Best Debut as well as Best Supporting Actor. He then starred in the action films, Road and Dum. In Dum, he played the role of a man trying to become a part of Indian police but faces many troubles with a police inspector.

Next, he starred in Saathiya (2002) directed by Shaad Ali. The film was a big hit at the box office and earned him a Filmfare nomination in the Best Actor category. He starred in a comedy Masti (2004). In 2004, he also starred in Yuva . In 2005 he acted the title character in the film Kisna: The Warrior Poet.