Plural of checksum; small numerical values calculated from data files to detect errors or verify authenticity.
From check (to verify) + sum (total). Terminology emerged in 1950s computer science and data transmission protocols.
A checksum is like a fingerprint for your data—two different files will have completely different checksums, so it's impossible to sneak a fake file past a checksum verification system.
Complete word intelligence in one call. Free tier — 50 lookups/day.