Jackknife n. : A large, strong clasp knife for the pocket; a pocket knife.

Example:
Where can I find a Jackknife appropriate for the year 1947?

Taxonomy
free encyclopedia, search, free dictionary, American film, character, complication, disambiguation pages, Personal tools, Interaction, Toolbox, Languages, non-profit organization, The Jack-Knife Man, Wiktionary, pocket knife, Jacknife, wrestling, degree rotation.

Defination from the web:
... free encyclopedia. Jump to: navigation, search. Look up jack-knife in Wiktionary, the free dictionary. Jackknife may refer to: ... Jackknifing, complication in vehicular towing. The Jack-Knife Man, a 1920 film. This disambiguation page lists articles associated with the same title. ...