Definition of illegal. : not according to or authorized by law : unlawful, illicit; also : not sanctioned by official rules (as of a game)
antibiotic. n. 1. (Pharmacology) any of various chemical substances, such as penicillin, streptomycin, chloramphenicol, and tetracycline, produced by various microorganisms, esp fungi, or made synthetically and capable of destroying or inhibiting the growth of microorganisms, esp bacteria. adj.
Define prebiotic: of, relating to, or being chemical or environmental precursors of the origin of life; also : existing or â¦ â prebiotic in a sentence of, relating to, or being chemical or environmental precursors of the origin of life; also : existing or occurring before the origin of lifeâ¦