brood

definition: 
] (Of a bird) sit on (eggs) to hatch them
sentence: 
Incubation lasts 10 to 16 days; chicks hatch synchronously and are brooded for about 4 days depending on the weather. Many of the birds are already brooding eggs, but some are still in the construction phase.
difficulty: 
easy
toefl frequency: 
1
toefl classification: