An epithelioid cell is a cell that resembles epithelial cells in that it directly contacts its neighboring cells via cell surface molecules or junctions. Unlike epithelial cells, however, epithelioid cells make contacts over their entire surface, rather than at restricted (e.g., basolateral) portions. The term epithelioid cell

Epithelioid cell

Epithelioid histiocytes are activated macrophages resembling epithelial cells: elongated, with finely granular, pale eosinophilic cytoplasm and central, ovoid nucleus, which is less dense than that of a lymphocyte...

also refers to a specialized cell type of the immune system.