non-correspondence

noun

1. communication by exchange of letters.
2. a letter or letters that pass between correspondents: It will take me all day to answer this business correspondence.
3. Also correspondency. an instance of corresponding.
4. similarity or analogy.
5. agreement; conformity.
6. news, commentary, letters, etc., received from a newspaper or magazine correspondent.
7. Mathematics. function(def 4a).

noun

1. the act or condition of agreeing or corresponding
2. similarity or analogy
3. agreement or conformity
4. 1. communication by the exchange of letters
   2. the letters so exchanged

n.early 15c., “harmony, agreement,” from Medieval Latin correspondentia, from correspondentem (nominative correspondens), present participle of correspondere (see correspond). Sense of “communication by letters” is first attested 1640s. n.

1. A relationship between corresponding points on each retina such that stimulation produces a single image.