palo santo /ˈpɑloʊ ˈsɑntəʊ/ noun1 •A medium-sized deciduous tree indigenous to the tropical dry forests of Central and South America, Bursera graveolens or Gonopterodendron sarmientoi, known for its sweet scent.Palo santo oil is the product of Bulnesia sarmienti , which is known as palo santo ( holy wood ) to the Paraguayans. — 1947 formspalo santos · palos santos