Renal agenesis. Renal agenesis is a medical condition in which one (unilateral) or both (bilateral) fetal kidneys fail to develop.
Polycrystalline cells are composed of multiple silicon crystals, which is a cheaper way to manufacture solar modules. Put simply, these cells are easier for a factory to produce, so they are less expensive. Polycrystalline cells are made by several methods, but most commonly with a cast of molten silicon.
Poly(methyl methacrylate) This article is about the transparent plastic sometimes called acrylic glass. For the glass/plastic laminate often called safety glass, see Laminated glass. For the neurotoxic designer drug PMMA, commonly sold as MDMA, see para-Methoxy-N-methylamphetamine. For other uses, see Acrylic (disambiguation).