propagation
propagate + -ion
https://gyazo.com/d314a720a2223269eac5823b01e015a1
source: Vegetative Propagation: Using Plant Cuttings to Reproduce Existing Plants
noun
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.