What is pertaining to, or denoting, an acid (called also acetyl- propionic acid), C5H8O3, obtained by the action of dilute acids on various sugars (as levulose). [Written also lævulinic.] called?

levulinic — Pertaining to, or denoting, an acid (called also acetyl- propionic acid), C5H8O3, obtained by the action of dilute acids on various sugars (as levulose). [Written also lævulinic.]. (Webster's 1913.)