6 letters · 6 points in Scrabble
noun Dutch astronomer who calculated the size of the universe and suggested that it is expanding (1872-1934)
noun an organism (person or animal) that sits
noun a person engaged to care for children when the parents are not home
originFrom Middle English sitter, sittere, syttare, equivalent to sit + -er.
Etymology from Wiktionary, CC BY-SA 3.0