Definition of "preoptic" []

• In front of the optic chiasm (adjective)

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• "GnRH1-producing neurons in regions of the brain known as the preoptic and hypothalamic regions in arrhinencephalic fetuses, whereas large numbers of these cells were present in control fetuses."
• "Langub, MC, et al. Estrogen receptor immunoreactive glia, endothelia and ependyma in guinea pig preoptic area and median eminence: electron microscopy."
• "Jacobson, W, et al. Decreased in mediobasal hypothalamic and preoptic area opoid binding are associated with the progesterone-induced luteinizing hormone surge."