black mangrove black·mang·rove uncommon noun 1. an Australian tree resembling the black mangrove of the West Indies and Florida Synonymsblack mangroveAegiceras majus 2. a mangrove of the West Indies and the southern Florida coast; occurs in dense thickets and has numerous short roots that bend up from the ground Synonymsblack mangroveAvicennia marina Related words Broader terms blackwoodtree Parts AvicenniaAegiceras WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.