ocrea Syllabification: (oc·re·a)Pronunciation: /ˈäkrēə, ˈōkrēə/ (also ochrea)Definition of ocrea noun (plural ocreae /ˈäkrē-ē, ˈōkrē-ē/ or ocreas) Botany a sheath around a stem formed by the cohesion of two or more stipules, characteristic of the dock family. Origin: mid 19th century: from Latin, literally 'protective legging'