essorant

Century Dictionary and Cyclopedia

1. In heraldry, about to soar: said of a bird, especially an eagle, standing with the wings lifted up as if about to rise on the wing.

Wiktionary

1. adj. heraldry, of a bird Standing, with wings spread, as if about to take flight.
2. adj. Soaring.

GNU Webster's 1913

1. adj. (Her.) Standing, but with the wings spread, as if about to fly; -- said of a bird borne as a charge on an escutcheon.