A lot vs. Alot: 9 Grammatical Pitfalls
1630s, "a cutting off (mentally), abstraction," from French précision (16c.) and directly from Latin praecisionem (nominative praecisio) "a cutting off," noun of action from past participle stem of praecidere (see precise). Meaning "preciseness" is from 1740.
The number of decimal places to which a number is computed.