Specialized cells in the liver that destroy bacteria, foreign proteins, and worn-out blood cells WordNet 3.0 & Open English WordNet

Kupffer cells, also known as stellate macrophages and Kupffer–Browicz cells, are specialized cells localized in the liver within the lumen of the liver sinusoids and are adhesive to their endothelial cells which make up the blood vessel walls. Wikipedia

Macrophages located in the liver Wikidata

A kind of specialized macrophage located in the liver lining the walls of the sinusoids that form part of the reticuloendothelial system. Wiktionary

Specialized macrophage located in the liver. Wiktionary (translation)