willem de sitter is a noun meaning "Dutch astronomer who calculated the size of the universe and suggested that it is expanding (1872-1934)". It carries one recorded sense.
Dutch astronomer who calculated the size of the universe and suggested that it is expanding (1872-1934)
Definitions, synonyms and semantic relations for willem de sitter come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.