hatch 2 
(hăch)
(hăch)v. hatched, hatch·ing, hatch·es
v.intr.
1. To emerge from an egg or other structure that surrounds and protects an embryo.
2. To emerge from a cocoon or chrysalis.
3. To emerge from the water when transforming from an aquatic larval or pupal form to a winged form, as a mayfly or caddisfly.
v.tr.
1. To produce (young) from an egg or eggs.
2. To cause (an egg or eggs) to produce young.
3. To devise or originate, especially in secret: hatch an assassination plot.
n.
1.
a. The act or an instance of hatching from an egg or similar structure.
b. The act or an instance of emerging from a cocoon or chrysalis.
c. The act or an instance of emerging from the water when transforming from an aquatic larval or pupal form to a winged form.
2.
a. A group of young organisms, especially birds, that hatch at one time; a brood.
b. A group of adult insects that emerge at one time.
c. A group of winged insects, as mayflies or caddisflies, that emerge at one time from a body of water.
[Middle English hacchen, from Old English *hæccan.]
hatcher n.