Webster's Revised Unabridged Dictionary · 1913

Miscount

Miscount , verb, transitive and intransitive

[Compare Old French mesconter, French mécompter. Compare Miscompute.]

To count erroneously.

Miscount , noun

[Compare French mécompte error, Old French mesconte.]

1.
An erroneous counting.
2.
An erroneous count of ballots cast in an election.