The work or procedure or perhaps the results of calculating calculation reckoning estimate
- the procedure of computing; deciding something by mathematical or logical methods
- planning some thing carefully and deliberately
- problem resolving that requires figures or amounts
- The act or procedure, and/or outcome, of computing; computation; reckoning, estimation.
- An expectation considering situations.
belated 14c., from Late Latin calculationem (nominative calculatio), noun of activity from past participle stem of calculare "to reckon, compute," from Latin calculus "reckoning, account," originally "pebble found in counting," diminutive of calx (genitive calcis) "limestone" (see chalk (n.)).
From certain expressions used in astrological texts that are earlier than the 7th century B.C. it would appear, indeed, that the beginnings at least of the calculation of sun and moon eclipses belong to the earlier period, but here, too, the chief work accomplished was after 400 B.e., and the defectiveness of early Babylonian astronomy may be gathered from the fact that as late as the 6th century B.C. an error of almost an entire month was made by the Babylonian astronomers in the attempt to determine through calculation the beginning of a certain year.