sci·ence 
(sīəns)
(sīəns)n.
1.
a. The observation, identification, description, experimental investigation, and theoretical explanation of phenomena: new advances in science and technology.
b. Such activities restricted to a class of natural phenomena: the science of astronomy.
2. A systematic method or body of knowledge in a given area: the science of marketing.
3. Archaic Knowledge, especially that gained through experience.
[Middle English, knowledge, learning, from Old French, from Latin scientia, from sciēns, scient-, present participle of scīre, to know; see skei- in the Appendix of Indo-European roots.]