pre·di·a·be·tes 
(prē′dī-ə-bētĭs, -tēz)
(prē′dī-ə-bētĭs, -tēz)n.
A latent condition preceding the development of diabetes mellitus, often marked by impaired glucose metabolism without clinical confirmation of the presence of the disease.
pre·di′a·betic (-bĕtĭk) adj. & n.