different between jackknife vs pocketknife

English

Noun

jackknife (plural jackknives)

1. Alternative spelling of jack-knife
   • 1887, Julian Hawthorne, A Tragic Mystery: From the Diary of Inspector Byrnes (page 25)

     […] 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. (statistics) 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.

Synonyms

• (statistics): leave-one-out

Translations

See also

• Resampling (statistics) on Wikipedia.Wikipedia

Verb

jackknife (third-person singular simple present jackknifes, present participle jackknifing, simple past and past participle jackknifed)

1. Alternative spelling of jack-knife

English

Alternative forms

• pocket-knife
• pocket knife

Etymology

From pocket + knife.

Noun

pocketknife (plural pocketknives)

1. A knife with blades or tools that the user can fold or retract into its handle, and of a size small enough for carrying safely and handily in a pocket. Since the late 19th century the term "penknife" has not been distinct from "pocketknife", but the latter tends to refer to larger and more robust versions, sometimes with more attached tools, suited to heavier duty for casual or ad hoc applications outdoors or in workshops.

Synonyms

• penknife

Related terms

• folding knife
• folder

Translations

See also

• pocketknife on Wikipedia.Wikipedia