positive crystal

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positive crystal [′päz·əd·iv ′krist·əl]

(optics)

Uniaxial anisotropic crystal having the ordinary index of refraction greater than the extraordinary index.

Biaxial anisotropic crystal having the intermediate index of refraction beta closer in value to alpha, and withZthe acute bisectrix.

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No references found			positional parameter positional representation positional servomechanism Positional Switch Positional System positional-error constant positioned weld positioning positioning action positioning band positioning time Positive positive acceleration positive afterimage positive allosteric control positive angle positive area positive axis positive bias positive birefringence positive charge positive click adjustment positive clutch positive column positive correlation positive crystal positive cutoff positive definite Positive Definite Quadratic form positive derail positive draft positive drive belt positive electrode positive electron positive element positive estuary positive feedback positive gene control positive glow positive heat supply positive image positive integer positive interference positive ion positive landform Positive Law positive lens positive linear functional Positive Logic positive meniscus lens positive mirror			positive contrast Positive control Positive control Positive control (disambiguation) Positive Control 1 Positive Control 2 Positive Control Airspace Positive Control Area Positive Control Check Positive Control Launch Positive Control Material Positive Control Turn-Around Point positive convergence positive convergence positive convergence positive convergence positive convergence Positive convexity positive correlation positive correlation positive correlation positive correlation positive correlation Positive covenant Positive Covenant of a Bond Positive Covenants Positive Covenants of a Bond Positive Crankcase Ventilation Positive Crankcase Ventilation Valve Positive Creations Music Collective positive crystal Positive crystals positive cutoff positive declaration positive declination positive defect positive defect positive defect positive defect Positive definite Positive definite Positive definite function Positive Definite Quadratic form Positive Deflection at 100 ms positive degree Positive Delivery Notification positive derail Positive Deviance Positive Deviance Initiative Positive Direct Flame Ionization Detection Positive Direction for Youth Positive Discrepancy Revenue Positive discrimination Positive discrimination Positive discrimination Positive discrimination Positive discrimination Positive displacement Positive Displacement Flow Meter Positive Displacement Motor positive draft

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