Population Demographics for St Joseph, Minnesota in 2016 and 2015.
Princeton's WordNet(0.00 / 0 votes)Rate this definition: 1  spawn(verb) the mass of eggs deposited by fish or amphibians or molluscs. 2  engender, breed, spawn(verb) call forth. 3  spawn(verb) lay spawn. The salmon swims upstream to spawn.
Spawning Grain to Bulk Substrate Edit. Once your grain spawn is fully colonized it is ready to be spawned to the bulk substrate (note that the word spawn is used as a noun when referring to the colonized grain, and also a verb when referring to the act of mixing it with the bulk substrate). Step 3: Mix in the spawn with the substrate as evenly as possible. 2  If the spawn is not evenly distributed within the substrate, colonization of the bulk substrate may be uneven, causing it to take longer thus allowing more time for contaminants to grow.