Definition of "omega"

The fact that the letter was incised above the line indicates that it is probably an omega.

2013, Albert Schachter, Fabienne Marchand, “Fresh Light on the Institutions and Religious Life of Thespiai: Sixe New Inscriptions from the Thespiai Survey”, in Paraskevi Martzavou, Nikolaos Papazarkadas, editors, Epigraphical Approaches to the Post-Classical, Polis, page 284

I am the Alpha and the Omega, the First and the Last, the Beginning and the End.

1978, New International Version, Revelation 22:13

And there is always the Omega Option. At any time you can go to Manhome, go down to the vaults, lift the black cover on your clone's stasis chamber, and push the black button.

2012, FX Moore, Confed: 2721: Xenocide War, page 383

The ratio between the rho and omega cross section is obtained.

2013, Issues in General Physics Research, page 1084

Often omegas go into heat and release pheromones that drive alphas wild.

2013, Kristina Busse, “Pon Farr, Mpreg, Bonds, and the Rise of the Omegaverse”, in Anne Jamison, editor, Fic: Why Fanfiction Is Taking Over the World‎, page 317

By writing a male character as an omega, experiences of being treated as other in female-coded ways are imagined to be experienced by a character who represents the male norm.

2017, Marianne Gunderson, "What is an omega? Rewriting sex and gender in omegaverse fanfiction", thesis submitted to the University of Oslo, page 5

Sweet as Peaches on the Tongue can be defined as the typical dark A/B/O story, wherein a rich alpha gentleman (Dr. Hannibal Lecter) comes across a very young, virginal omega (Will Graham) by accident.

2018, Laura Campillo Arnaiz, “When the Omega Empath Met the Alpha Doctor: An Analysis of Alpha/Beta/Omega Dynamics in the Hannibal Fandom”, in Ashton Spacey, editor, The Darker Side of Slash Fan Fiction, page 126