impregnation -- (material with which something is impregnated; "the impregnation, whatever it was, had turned the rock blue")
impregnation, saturation -- (the process of totally saturating something with a substance; "the impregnation of wood with preservative"; "the saturation of cotton with ether")
fertilization, fertilisation, fecundation, impregnation -- (creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant)
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