angiosperm

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A seed plant having ovules enclosed in an ovary and exhibiting double fertilization; a flowering plant.

from The Century Dictionary.

• noun A plant whose seeds are contained in a protecting seed-vessel.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Bot.) A plant which has its seeds inclosed in a pericarp. Contrasted with gymnosperm.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun botany A member of the plant group characterized by having ovules enclosed in an ovary; the angiosperms or flowering plants: the Angiospermae, Magnoliophyta, Magnoliopsida, etc.
• adjective botany pertaining to the angiosperms.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun plants having seeds in a closed ovary