propagation has definitions from the fields of biology,sexuality,physics
1
[ noun ] the spreading of something (a belief or practice) into new regions

Synonyms

extension

Used in print

(John Michael Ray, "Rhode Island's Reactions...)

Resolved that his wrongs and bereavements in Kansas , occasioned by the violence and brutality of those who were intent_on the propagation of slavery in that territory , call_for a charitable judgment upon his recent efforts in Virginia to undermine the despotism from which he had suffered , and commend his family to the special sympathy and aid of all who pity suffering and reverence justice .

Related terms

dissemination propagate

2
[ noun ] (biology,sexuality) the act of producing offspring or multiplying by such production

Used in print

(The Rev. John A. O'Brien, "Let's Take Birth Control...)

Thus , man can readily deduce that the primary objective end of the conjugal act is procreation , the propagation of the race .

3
[ noun ] (physics) the movement of a wave through a medium
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