Biosynthesis, characterization and evaluation of anti-bone carcinoma, cytotoxicity, and antioxidant properties of gold nanoparticles mediated by Citrus reticulata seed aqueous extract: Introducing a novel chemotherapeutic drug

•The biosynthesized gold nanoparticles scavenged DDPH with IC50 of 87 μg/mL.•The IC50s of AuNPs were 166, 242, 174, and 215 µg/mL against A-673, CADO-ES1, MG-63 and CH-3573 cell lines, respectively.•The gold nanoparticles were spherical with an average size of 11.14 to 32.76 nm.