正字学

正字學
zhèngzìxué

orthography (study of correct spelling according to established usage)

Wiktionary

Entry Composition

1 正字 zhèngzì
  1. to correct an erroneously written character
  2. regular script (calligraphy)
  3. standard form (of a character or spelling)
2 学 xué
  1. to learn
  2. to study
  3. to imitate
  4. science
  5. -ology