noun a large, strong, pocketknife
verb to perform a dive in which the body is bent at the waist and the legs are brought up over the head
In mathematics, a jackknife estimator is used for estimating the variance of a sample statistic.
In cooking, a jackknife clam is a type of shellfish commonly used in recipes.
In statistics, a jackknife is a resampling technique used for estimating the bias and variance of a statistical estimator.
In physics, a jackknife is a type of lever used for lifting heavy objects.
A jackknife is a type of knife with a folding blade, commonly used for outdoor activities such as camping, hiking, and fishing.
In mechanical engineering, a jackknife mechanism refers to a type of folding mechanism used in various applications.
In diving, a jackknife refers to a type of dive where the diver bends at the waist and brings their knees up to their chest before straightening out.
In knife making, a jackknife pattern refers to a specific design for a folding knife.
In writing, 'jackknife' may be used metaphorically to describe a sudden change in direction or focus within a narrative or argument.
In psychology, 'jackknife' may be used to refer to a specific statistical technique for analyzing data, particularly in the context of regression analysis.
In culinary arts, 'jackknife' may refer to a specific cutting technique used to prepare certain types of vegetables or meats.
In construction, 'jackknife' may refer to a maneuver or position of heavy machinery, such as a crane or excavator, to optimize reach and stability.