canonical
adjective /kəˈnɒnɪkl/
  /kəˈnɑːnɪkl/
 (also canonic)
- included in a list of holy books that are accepted as what they are claimed to be 
- the canonical Gospels of the New Testament
 
 - according to the law of the Christian Church
- canonical rules
 
 - accepted as belonging to the group of writers or works of literature that must be highly respected
- canonical writers like Jane Austen
 
 - accepted as being true, correct and established
- the canonical methods of science as taught in the classroom
 
 - (specialist) in the simplest accepted form in mathematics
- the standard canonical form for a matrix
 
 
Word Originlate Middle English: from medieval Latin canonicalis, from Latin canonicus ‘canonical’, from Greek kanonikos, from kanon ‘rule’.