sharpness
71dull — I. adjective Etymology: Middle English dul; akin to Old English dol foolish, Old Irish dall blind Date: 13th century 1. mentally slow ; stupid 2. a. slow in perception or sensibility ; insensible < somewhat dull of h …
72Japanese sword — Traditional Samurai swords and fittings A Japanese sword, or nihontō (日本刀 or にほんとう, lit. Japanese sword …
73Gloucester — This article is about the city in England; for other uses see Gloucester (disambiguation). City of Gloucester   City Non metropolitan district   …
74List of Biblical names — This is a list of names from the Bible, mainly taken from the 19th century public domain resource: : Hitchcock s New and Complete Analysis of the Holy Bible by Roswell D. Hitchcock, New York: A. J. Johnson, 1874, c1869.Each name is given with its …
75Progressive scan — Progressive scanning (alternatively referred to as noninterlaced scanning) is a way of displaying, storing, or transmitting moving images in which all the lines of each frame are drawn in sequence. This is in contrast to interlaced video used in… …
76F-number — In optics, the f number (sometimes called focal ratio, f ratio, or relative aperture [Smith, Warren Modern Lens Design 2005 McGraw Hill] ) of an optical system expresses the diameter of the entrance pupil in terms of the focal length of the lens; …
77Circle of confusion — For the closely related topic in microscopy, see Point spread function. In optics, a circle of confusion is an optical spot caused by a cone of light rays from a lens not coming to a perfect focus when imaging a point source. It is also known as… …
78Blade — For other uses, see Blade (disambiguation). Knife blades A blade is that portion of a tool, weapon, or machine with a cutting edge and/or a pointed tip that is designed to cut and/or puncture, stab, slash, chop, slice, thrust, or scrape animate… …
79Ogive — For other uses, see Ogive (disambiguation). An ogive (pronounced /ˈoʊdʒaɪv/ oh jyv) is the roundly tapered end of a two dimensional or three dimensional object. Contents 1 Applied physical science and engineering 2 …
80Grind — The grind of a blade refers to the shape of the cross section of the blade. It is distinct from the type of blade ( e.g. , clip point or drop point knife, sabre or cutlass, axe or chisel, etc.), though different tools and blades may have lent… …
