jackknife

noun

1. (alt-of, alternative)Alternative spelling of jack-knife.

   “[…] near it is a cluster of weapons of villanous aspect, comprising every thing from a Malayan creese to a sailor's jackknife or a Smith & Wesson revolver.”

2. A resampling method that applies estimators to all subsamples that each omit a single different group (possibly of a single datapoint) of the original sample to provide a sample distribution of the estimate.

verb

1. (alt-of, alternative)Alternative form of jack-knife.