| OPD |
The difference in path length between the actual wavefront in an optical system and the equivalent spherical wavefront.
Ãâó: www.angelfire.com/stars5/astroinfo/gloss/o.html
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| OPD |
A ticker tape symbol that signifies that a security's price has changed materially from the previous day's close. A material change is usually 2 or more points on stocks selling at $20 or higher, 1 or more points on stocks selling at less than $20. OPD also designates a security's first transaction of the trading session after it has had a delayed opening.
Ãâó: www.environmentalinvestors.com/glossary/ilOnOp.htm
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