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The nanoparticles of ZnO biosynthesis have distinctive features. many researchers have noted it cute to research in diverse research disciplines due to modern medical applications. different NPS have been estimated for their potential usage in which zinc oxide (ZnO) nps have confirmed to be a viable replacement for treating environmental pollutants, due to their excellent capacity to absorbed rays of UV. The purchase seeds of Trigonella foenum-graecum, clove buds, and leaves of the Salvia officinalis plant from the local market and extracted by hot plate methods. the purpose of the current study was the green synthesis of ZnO nanoparticles (NPS) from the different above extracts followed by a comprehensive characterization and assessment of their biological potential. no-NPS synthesized as such was subjected to characterization employment standard techniques such as particle size and tem. highly stable crystalline NPS with sizes between 32.6 and 142.7 nm were obtained from different plants. These Nps revealed a wide range of biological applications showing antioxidant, moderate α-amylase inhibitors, antibacterial and cytotoxic powers. in addition to the percentage of s. epidermidis and k. pneumonia isolated from human and children was recorded mean (40 and 60.4 %) respectively. The highest antibacterial activity (17±0.10 mm and 18±0.09) was shown by seed salvia Officinalis-mediated ZnO NPS against k and s. epidermidis respectively. on the other aspect the result obtained from using silymarin and the mediated zinc nanoparticles showed limited zone inhibition (15 ± 0.09, 15 ± 0.15, and 8 ± 0.02, 8 ± 0.02) respectively. Among all of the NPS synthesized and used, the effect of seed extract-mediated NPS was found to be most promising for future applications.