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Definition for word linear.

Micrometer Mi*crom"e*ter, n. [Micro- + -meter: cf. F. microm[`e]tre.] An instrument, used with a telescope or microscope, for measuring minute distances, or the apparent diameters of objects which subtend minute angles. The measurement given directly is that of the image of the object formed at the focus of the object glass. Circular, or Ring, micrometer, a metallic ring fixed in the focus of the object glass of a telescope, and used to determine differences of right ascension and declination between stars by observations of the times at which the stars cross the inner or outer periphery of the ring. Double image micrometer, a micrometer in which two images of an object are formed in the field, usually by the two halves of a bisected lens which are movable along their line of section by a screw, and distances are determined by the number of screw revolutions necessary to bring the points to be measured into optical coincidence. When the two images are formed by a bisected object glass, it is called a divided-object-glass micrometer, and when the instrument is large and equatorially mounted, it is known as a heliometer. Double refraction micrometer, a species of double image micrometer, in which the two images are formed by the double refraction of rock crystal. Filar, or Bifilar, micrometer. See under Bifilar. Micrometer caliper or gauge (Mech.), a caliper or gauge with a micrometer screw, for measuring dimensions with great accuracy. Micrometer head, the head of a micrometer screw. Micrometer microscope, a compound microscope combined with a filar micrometer, used chiefly for reading and subdividing the divisions of large astronomical and geodetical instruments. Micrometer screw, a screw with a graduated head used in some forms of micrometers. Position micrometer. See under Position. Scale, or Linear, micrometer, a minute and very delicately graduated scale of equal parts used in the field of a telescope or microscope, for measuring distances by direct comparison.


Explination we found from Wikipedia for linear.

- in mathematics , a linear map or linear function f(x) is a function which satisfies the following two properties: additivity (also
- the lincoln near-earth asteroid research (linear) project is a collaboration of the united states air force , nasa , and the massachusetts
- in mathematics , a linear map (also called a linear mapping, linear transformation or, in some contexts, linear function ) is a mapping v
- linear algebra is the branch of mathematics concerning vector space s, often finite or countably infinite dimensional, as well as linear
- linear programming (lp, or linear optimization) is a method to achieve the best outcome (such as maximum profit or lowest cost) in a
- in statistics , linear regression is an approach to model the relationship between a scalar dependent variable y and one or more
- in linear algebra , two slightly different notions of linear independence are used: the linear independence of a family of vectors, and the
- in mathematics , a system of linear equations (or linear system) is a collection of linear equation s involving the same set of variable s
- a linear system is a mathematical model of a system based on the use of a linear operator . linear systems typically exhibit features and
- a linear equation is an algebraic equation in which each term is either a constant or the product of a constant and (the first power of


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