empirical

/im-ˈpir-i-kəl/

empiric "of physicians in ancient Greece and Rome holding that treatment should be based on observation rather than theory" (going back to Middle English emperic, borrowed from early Medieval Latin empīricus, borrowed from Greek empeirikós, "based on observation (of medical treatment), experienced") +

adjective

  1. originating in or based on observation or experience

  2. relying on experience or observation alone often without due regard for system and theory

  3. capable of being verified or disproved by observation or experiment

empirical data

noun

  1. a chemical formula showing the simplest ratio of elements in a compound rather than the total number of atoms in the molecule

CHO is the empirical formula for glucose