fertilizationmedical dictionary

1. <cell biology> The essential process in sexual reproduction, involving the union of two specialised haploid cells, the male and female gametes to give a diploid cell, the zygote, which then develops to form a new organism.

2. <biology> The act of fecundating or impregnating animal or vegetable germs; especially, the process by which in flowers the pollen renders the ovule fertile, or an analogous process in flowerless plants; fecundation; impregnation.

3. <botany> Close fertilization, the fertilization of pistils by pollen derived from the stamens of the same blossom. Cross fertilization, fertilization by pollen from some other blossom. See Cross.

(28 Oct 1998)