propagate + -ion

source: Vegetative Propagation: Using Plant Cuttings to Reproduce Existing Plants

1. the breeding of specimens of a plant or animal by natural processes from the parent stock:

(動植物の)繁殖, 増殖

e.g. the propagation of plants by root cuttings

e.g. as modifier : propagation techniques such as grafting.

reproduction by natural processes:

e.g. hunting regulations ensure the propagation of the species

e.g. asexual propagation is the primary mode of reproduction.

2. the action of widely spreading and promoting an idea, theory, etc.:

普及; 伝道; (病気の)蔓延

e.g. a life devoted to the propagation of the Catholic faith

e.g. the propagation of ideas was important.

3. transmission of motion, light, sound, etc. in a particular direction or through a medium:

(性質の)遺伝; (音などの)伝達]

e.g. the propagation of radio waves through space

e.g. the physics of light propagation.