penetration(redirected from Penetrations)
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1. Marketing the proportion of the total number of potential purchasers of a product or service who either are aware of its existence or actually buy it
2. another name for depth of field
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
That phase of the letdown from high altitude to a specified approach altitude.
The distance from the original surface of the base metal to that point at which weld fusion ends.
A surface defect on a casting caused by molten metal filling voids in the sand mold.
Distance to which a projectile sinks into a target.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
1. The intersection of two vaulting surfaces.
2. The consistency of a bituminous material expressed as the distance (in hundredths of a centimeter) that a standard needle vertically penetrates a sample of the material under known conditions of loading, time, and temperature. Unless otherwise specified, the load, time, and temperature are understood to be 100 g, 5 sec, and 25°C (77°F), respectively.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
ii. A flight into hostile airspace as in to penetrate enemy air defense. Also, the depth to which something penetrates, as in “When the Allied bombers increased their penetration into Germany.”
iii. The term also refers to weather penetration, which implies a flight deep into a cloud with vertical development or into the eye of a tropical revolving storm, as in “the aircraft penetrated the cumulonimbus clouds and came out unscathed.”
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
penetrationThe successful unauthorized breach of a security perimeter. See penetration test.
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