lambdoid Syllabification: (lamb·doid)Pronunciation: /ˈlamˌdoid/Definition of lambdoid adjective resembling the Greek letter lambda in form. Anatomy of or denoting the suture near the back of the skull that connects the parietal bones with the occipital. Derivatives lambdoidalPronunciation: /lamˈdoidl/ adjective lambdoid in other Oxford dictionaries Definition of lambdoid in the British & World English dictionary