fer·til·iz·abil·i·ty \ˌfər]d.əlˌīzəˈbiləd.ē, ˌfə̄], ˌfəi], ]təl-, -bilətē, -i\noun (-es) : capability of being fertilized; specifically: the period in the life of an egg during which it is able to participate effectively in fertilization < the length of life of an egg and the length of its fertilizability — George Barth >