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From The Collaborative International Dictionary of English v.0.48:
Angiosperm \An"gi*o*sperm\ (-[a^]n"j[i^]*[-o]*sp[~e]rm), n. [Angio- + Gr. ?, ?, seed.] (Bot.) A plant which has its seeds inclosed in a pericarp. Contrasted with gymnosperm. [1913 Webster] Note: The term is restricted to exogenous plants, and applied to one of the two grand divisions of these species, the other division including gymnosperms, or those which have naked seeds. The oak, apple, beech, etc., are angiosperms, while the pines, spruce, hemlock, and the allied varieties, are gymnosperms. [1913 Webster]