noun
A device for hatching eggs by artificial warmth, used in poultry farming and biology.
孵卵器でひよこをかえす。
Hatch chicks in an incubator.
孵化器 is a more general term for an incubator used for hatching eggs or culturing microorganisms, while 孵卵器 specifically refers to egg incubation.
Compound of 孵 (hatch) + 卵 (egg) + 器 (device). The reading ふらん is the on'yomi of 孵卵.