squamous Syllabification: (squa·mous)Pronunciation: /ˈskwāməs/ (also squamose)Definition of squamous adjective covered with or characterized by scales:a squamous black hide Anatomy relating to, consisting of, or denoting a layer of epithelium that consists of very thin flattened cells:squamous cell carcinoma [attributive] Anatomy denoting the flat portion of the temporal bone that forms part of the side of the skull. Origin: late Middle English: from Latin squamosus, from squama 'scale'squamous in other Oxford dictionaries Definition of squamous in the British & World English dictionary