Grade A 'top quality, fit for human consumption' (originally of milk) is from a U.S.

edge gradient in radiology, the penumbra or partial shadow on a radiograph caused by the three-dimensional shape of an object.

The marginal rate of substitution focuses on demand. Meaning 'class of things having the same quality or value' is from 1807 meaning 'division of a school curriculum equivalent to one year' is from 1835 that of 'letter-mark indicating assessment of a student's work' is from 1886 (earlier used of numerical grades). gradient grade-ent rate of increase or decrease of a variable value, or its representative curve. MRT is also considered the absolute value of the slope of the production possibilities frontier. Meaning 'inclination of a road or railroad' is from 1811. 1510s, 'degree of measurement,' from French grade 'grade, degree' (16c.), from Latin gradus 'a step, a pace, gait a step climbed (on a ladder or stair) ' figuratively 'a step toward something, a degree of something rising by stages,' from gradi (past participle gressus) 'to walk, step, go,' from PIE root *ghredh- 'to walk, go.' It replaced Middle English gree 'a step, degree in a series,' from Old French grei 'step,' from Latin gradus. gradient, in mathematics, a differential operator applied to a three-dimensional vector-valued function to yield a vector whose three components are the partial derivatives of the function with respect to its three variables.

Gradient definition