The present participle of debit; the act of charging or recording a subtraction from an account.
From 'debit' with the gerund/present participle suffix '-ing.' This is standard English verb formation.
The phrase 'debiting and crediting' forms the foundation of double-entry bookkeeping, one of humanity's greatest intellectual achievements that few people understand or appreciate!
Complete word intelligence in one call. Free tier — 50 lookups/day.