Also known as: PA., PA..., PA-
PA has various meanings in the Technology category. Discover the full forms, definitions, and usage contexts of PA in Technology.
An antenna assembly whose directivity is controlled by signal phasing and not by mechanical means.
TechnologyPhenanthrene is a polycyclic aromatic hydrocarbon composed of three fused benzene rings. The name phenanthrene is a composite of phenyl and anthracene. In its pure form, it is found in cigarette smoke and is a known irritant, photosensitizing skin to light.Phenanthrene appears as a white powder having blue fluorescence.
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