planocellular

Relating to or composed of flat cells. [L. planus, flat, + cellular]

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pla·no·cel·lu·lar .plā-nō-'sel-yə-lər adj composed of relatively flat cells <\planocellular cancer of the urinary bladder>

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pla·no·cel·lu·lar (pla″no-selґu-lər) made up of flat cells; cf. squamous.