1. A rampart; a wall, as in a fortification

Derived forms: vallums

Encyclopedia: Vallum

• photoconductive
• photoconductive cell
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• photocopier
• photocopy
• photodegradable
• photoelectric
• photoelectric cell
• photoelectric emission
• photoelectrical
• photoelectrically
• photoelectricity
• photoelectron
• photoemission
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• photoengrave
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• photogelatin process
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• photogenic epilepsy
• photogram
• photogrammetry