It took a couple of seconds for Don to place in his mind just what a gregarian was. Between Planets

The plate of baked gregarian was removed and Dr. Jefferson ordered something for him called a "Mount Etna." Between Planets

He saw at once, that, sensitive as she was to every impression, this fear was a contagious one, a mere gregarian affinity, and that she needed the preponderating warmth and strength of a protecting presence, the influence of a fuller vitality. The Atlantic Monthly, Volume 06, No. 38, December, 1860

There is a struggle between its members motived by the desire for individual expression and gain; and, alongside of it, a sense of solidarity, a movement to mutual, reciprocal relations, motived by the gregarian instinct. Socialism A Summary and Interpretation of Socialist Principles

Where the vibrations of matter are low, its responsive movement is gregarian rather than individual. Child and Country A Book of the Younger Generation