Definition of "omicron" []

• The 15th letter of the Greek alphabet. See Table at alphabet. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "(It's only later, during AC's "Catastrophe For Two Worlds" event, in an attempt to simplify the morass of rationales for superpowers, that the Prof's "primalised matter" is revealed to be none other than the proteanite toxic to Overman, but in an omicron-irradiated form harmless to the Man of the Future.)"
• "The Thunderbolt who heralded the Silver Age with his 1956 revival had his particles accelerated to the speed of light by blue omicron rays ... but that's another story."
• "The Greek scholar will look to the Greek letters for Jesus: "iota eta sigma omicron upsilon sigma," which is variously transliterated IHSOYS or IHCOYC, the latter when converted to Latin letters using the common curved sigma variant."