dissected Syllabification: (dis·sect·ed)Pronunciation: /diˈsektid, dī-/Definition of dissected adjective 1having been cut up for anatomical study. 2having a divided form or structure, in particular. Botany (of a leaf) divided into many deep lobes. Geology (of a plateau or upland) divided by a number of deep valleys. dissected in other Oxford dictionaries Definition of dissected in the British & World English dictionary