Brooder

a device or structure for the rearing of young chickens or other birds.
a person or animal that broods.
a number of young produced or hatched at one time; a family of offspring or young.
a breed, species, group, or kind:
The museum exhibited a brood of monumental sculptures.
to sit upon (eggs) to hatch, as a bird; incubate.
(of a bird) to warm, protect, or cover (young) with the wings or body.
to think or worry persistently or moodily about; ponder:
He brooded the problem.
to sit upon eggs to be hatched, as a bird.
to dwell on a subject or to meditate with morbid persistence (usually followed by over or on).
kept for breeding:
a brood hen.
brood above/over, to cover, loom, or seem to fill the atmosphere or scene:
The haunted house on the hill brooded above the village.
Historical Examples

The Dollar Hen Milo M. Hastings
Harper’s Round Table, June 25, 1895 Various
The New Society Walther Rathenau
Ducks and Geese Harry M. Lamon
Agriculture for Beginners Charles William Burkett
Ducks and Geese Harry M. Lamon
The Crimson Tide Robert W. Chambers
Natural and Artificial Duck Culture James Rankin
Outdoor Sports and Games Claude H. Miller
The Dollar Hen Milo M. Hastings

noun
an enclosure or other structure, usually heated, used for rearing young chickens or other fowl
a person or thing that broods
noun
a number of young animals, esp birds, produced at one hatching
all the offspring in one family: often used jokingly or contemptuously
a group of a particular kind; breed
(as modifier) kept for breeding: a brood mare
verb
(of a bird)

to sit on or hatch (eggs)
(transitive) to cover (young birds) protectively with the wings

when intr, often foll by on, over or upon. to ponder morbidly or persistently
n.
v.