impregnation

(noun) material with which something is impregnated. Example: "The impregnation, whatever it was, had turned the rock blue."

(noun) the process of totally saturating something with a substance. Synonyms: saturation. Examples: "The impregnation of wood with preservative." "The saturation of cotton with ether."

(noun) creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant. Synonyms: fertilization, fertilisation, fecundation.