Optically negative
Optically Op"tic*al*ly, adv. 1. By optics or sight. [1913 Webster]

2. With reference to optics. [1913 Webster]

{Optically active}, {Optically inactive} (Chem. Physics), terms used of certain isomeric substances which, while identical with each other in other respects, differ in this, viz., that they do or do not produce right-handed or left-handed circular polarization of light. See {optical activity}.

{Optically positive}, {Optically negative}. See under {Refraction}. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • Optically — Op tic*al*ly, adv. 1. By optics or sight. [1913 Webster] 2. With reference to optics. [1913 Webster] {Optically active}, {Optically inactive} (Chem. Physics), terms used of certain isomeric substances which, while identical with each other in… …   The Collaborative International Dictionary of English

  • Optically active — Optically Op tic*al*ly, adv. 1. By optics or sight. [1913 Webster] 2. With reference to optics. [1913 Webster] {Optically active}, {Optically inactive} (Chem. Physics), terms used of certain isomeric substances which, while identical with each… …   The Collaborative International Dictionary of English

  • Optically inactive — Optically Op tic*al*ly, adv. 1. By optics or sight. [1913 Webster] 2. With reference to optics. [1913 Webster] {Optically active}, {Optically inactive} (Chem. Physics), terms used of certain isomeric substances which, while identical with each… …   The Collaborative International Dictionary of English

  • Optically positive — Optically Op tic*al*ly, adv. 1. By optics or sight. [1913 Webster] 2. With reference to optics. [1913 Webster] {Optically active}, {Optically inactive} (Chem. Physics), terms used of certain isomeric substances which, while identical with each… …   The Collaborative International Dictionary of English

  • Negative stain — Electron micrograph of (organic) plant tissue without (top) and with OsO4 staining Negative staining is an established method, often used in diagnostic microscopy, for contrasting a thin specimen with an optically opaque fluid. For bright field… …   Wikipedia

  • Angle of refraction — Refraction Re*frac tion (r?*fr?k sh?n), n. [F. r[ e]fraction.] 1. The act of refracting, or the state of being refracted. [1913 Webster] 2. The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a… …   The Collaborative International Dictionary of English

  • Conical refraction — Refraction Re*frac tion (r?*fr?k sh?n), n. [F. r[ e]fraction.] 1. The act of refracting, or the state of being refracted. [1913 Webster] 2. The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a… …   The Collaborative International Dictionary of English

  • declination — Refraction Re*frac tion (r?*fr?k sh?n), n. [F. r[ e]fraction.] 1. The act of refracting, or the state of being refracted. [1913 Webster] 2. The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a… …   The Collaborative International Dictionary of English

  • Differential refraction — Refraction Re*frac tion (r?*fr?k sh?n), n. [F. r[ e]fraction.] 1. The act of refracting, or the state of being refracted. [1913 Webster] 2. The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a… …   The Collaborative International Dictionary of English

  • Double refraction — Refraction Re*frac tion (r?*fr?k sh?n), n. [F. r[ e]fraction.] 1. The act of refracting, or the state of being refracted. [1913 Webster] 2. The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a… …   The Collaborative International Dictionary of English

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