8 letters · 14 points in Scrabble
noun an expert at calculation (or at operating calculating machines)
noun a handbook of tables used to facilitate computation
originFrom Middle English reknere, rekenere. Cognate with Afrikaans rekenaar, Dutch Low Saxon rekener, German Rechner, Danish regner, Swedish räknare. By surface analysis, reckon + -er.
Etymology from Wiktionary, CC BY-SA 3.0