n.
1.Dutch astronomer who calculated the size of the universe and suggested that it is expanding (1872-1934)
2.an organism (person or animal) that sits
3.a person engaged to care for children when the parents are not home
4.a person who poses for a painter or sculptor
5.a domestic hen ready to brood
Idiom of the Day
have rocks in one's head
to be stupid, to not have good judgement
The girl has rocks in her head. She should never have bought that old car.