Etymology
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impregnation (n.)

late 14c., "making or becoming pregnant," from Old French impregnacion or directly from Late Latin impregnationem (nominative impregnatio), noun of action from past participle stem of impraegnare "to impregnate" (see impregnate).

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Definitions of impregnation

impregnation (n.)
material with which something is impregnated;
the impregnation, whatever it was, had turned the rock blue
impregnation (n.)
the process of totally saturating something with a substance;
the impregnation of wood with preservative
Synonyms: saturation
impregnation (n.)
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
From wordnet.princeton.edu