The Collaborative International Dictionary
Prominency
Prominence \Prom"i*nence\, Prominency \Prom"i*nen*cy\, n. [L. prominentia: cf. F. prominence. See Prominent. ]
The quality or state of being prominent; a standing out from something; conspicuousness.
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That which is prominent; a protuberance.
Solar prominences. (Astron.) See Solar Protuberances, under Protuberance.
Wiktionary
prominency
n. prominence.