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From The Collaborative International Dictionary of English v.0.48:
Fertilization \Fer`ti*li*za"tion\, n. 1. The act or process of rendering fertile. [1913 Webster] 2. (Biol.) The act of fecundating or impregnating animal or vegetable germs; esp., the process by which in flowers the pollen renders the ovule fertile, or an analogous process in flowerless plants; fecundation; impregnation. [1913 Webster] Close fertilization (Bot.), the fertilization of pistils by pollen derived from the stamens of the same blossom. Cross fertilization, fertilization by pollen from some other blossom. See under Cross, a. [1913 Webster]