from The Century Dictionary.
- In heraldry, turned so as to be nearly affronté, but showing a part, of the flank: noting an animal used as a bearing.
Sorry, no etymologies found.
The sea was as smooth as glass, the sun obscured during the day by a haze, so that the heat did not affect Webb's head, and in the night a three-quartered moon lighted him on his way.
He kept looking afar, sweeping the three-quartered circle of horizon till his judgment of distance was confounded and his sense of proportion dwarfed one moment and magnified the next.