. "Any process that stops, prevents, or reduces the frequency, rate or extent of receptor mediated endocytosis, the uptake of external materials by cells, utilizing receptors to ensure specificity of transport." . . . "negative regulation of receptor-mediated endocytosis" . "down regulation of receptor mediated endocytosis" . "down-regulation of receptor mediated endocytosis" . "downregulation of receptor mediated endocytosis" . "inhibition of receptor mediated endocytosis" . "negative regulation of receptor mediated endocytosis" . . . . . .